Update book location

43 files changed, 120 insertions, 122 deletions

diff --git a/.ci/scripts/check_lockfile.py b/.ci/scripts/check_lockfile.py
index dfdc0105d5..19cec7ddd6 100755
--- a/.ci/scripts/check_lockfile.py
+++ b/.ci/scripts/check_lockfile.py
@@ -17,7 +17,7 @@ except Exception:
         """\
     Lockfile is not version 2.0. You probably need to upgrade poetry on your local box
     and re-run `poetry lock --no-update`. See the Poetry cheat sheet at
-    https://matrix-org.github.io/synapse/develop/development/dependencies.html
+    https://element-hq.github.io/synapse/develop/development/dependencies.html
     """
     )
     raise
diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
index 0dfab4e087..41503899a1 100644
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -1,14 +1,14 @@
 ### Pull Request Checklist
 
-<!-- Please read https://matrix-org.github.io/synapse/latest/development/contributing_guide.html before submitting your pull request -->
+<!-- Please read https://element-hq.github.io/synapse/latest/development/contributing_guide.html before submitting your pull request -->
 
 * [ ] Pull request is based on the develop branch
-* [ ] Pull request includes a [changelog file](https://matrix-org.github.io/synapse/latest/development/contributing_guide.html#changelog). The entry should:
+* [ ] Pull request includes a [changelog file](https://element-hq.github.io/synapse/latest/development/contributing_guide.html#changelog). The entry should:
   - Be a short description of your change which makes sense to users. "Fixed a bug that prevented receiving messages from other servers." instead of "Moved X method from `EventStore` to `EventWorkerStore`.".
   - Use markdown where necessary, mostly for `code blocks`.
   - End with either a period (.) or an exclamation mark (!).
   - Start with a capital letter.
   - Feel free to credit yourself, by adding a sentence "Contributed by @github_username." or "Contributed by [Your Name]." to the end of the entry.
-* [ ] Pull request includes a [sign off](https://matrix-org.github.io/synapse/latest/development/contributing_guide.html#sign-off)
-* [ ] [Code style](https://matrix-org.github.io/synapse/latest/code_style.html) is correct
-  (run the [linters](https://matrix-org.github.io/synapse/latest/development/contributing_guide.html#run-the-linters))
+* [ ] Pull request includes a [sign off](https://element-hq.github.io/synapse/latest/development/contributing_guide.html#sign-off)
+* [ ] [Code style](https://element-hq.github.io/synapse/latest/code_style.html) is correct
+  (run the [linters](https://element-hq.github.io/synapse/latest/development/contributing_guide.html#run-the-linters))
diff --git a/INSTALL.md b/INSTALL.md
index f199b233b9..9342de3c52 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -1,7 +1,7 @@
 # Installation Instructions
 
 This document has moved to the
-[Synapse documentation website](https://matrix-org.github.io/synapse/latest/setup/installation.html).
+[Synapse documentation website](https://element-hq.github.io/synapse/latest/setup/installation.html).
 Please update your links.
 
 The markdown source is available in [docs/setup/installation.md](docs/setup/installation.md).
diff --git a/README.rst b/README.rst
index d4d1a7611b..d13dc0cb78 100644
--- a/README.rst
+++ b/README.rst
@@ -17,17 +17,17 @@ Matrix project <https://matrix.org/docs/guides/introduction>`_, and the `formal
 Installing and configuration
 ============================
 
-The Synapse documentation describes `how to install Synapse <https://matrix-org.github.io/synapse/latest/setup/installation.html>`_. We recommend using
-`Docker images <https://matrix-org.github.io/synapse/latest/setup/installation.html#docker-images-and-ansible-playbooks>`_ or `Debian packages from Matrix.org
-<https://matrix-org.github.io/synapse/latest/setup/installation.html#matrixorg-packages>`_.
+The Synapse documentation describes `how to install Synapse <https://element-hq.github.io/synapse/latest/setup/installation.html>`_. We recommend using
+`Docker images <https://element-hq.github.io/synapse/latest/setup/installation.html#docker-images-and-ansible-playbooks>`_ or `Debian packages from Matrix.org
+<https://element-hq.github.io/synapse/latest/setup/installation.html#matrixorg-packages>`_.
 
 .. _federation:
 
 Synapse has a variety of `config options
-<https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html>`_
+<https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html>`_
 which can be used to customise its behaviour after installation.
 There are additional details on how to `configure Synapse for federation here
-<https://matrix-org.github.io/synapse/latest/federate.html>`_.
+<https://element-hq.github.io/synapse/latest/federate.html>`_.
 
 .. _reverse-proxy:
 
@@ -43,7 +43,7 @@ It is recommended to put a reverse proxy such as
 doing so is that it means that you can expose the default https port (443) to
 Matrix clients without needing to run Synapse with root privileges.
 For information on configuring one, see `the reverse proxy docs
-<https://matrix-org.github.io/synapse/latest/reverse_proxy.html>`_.
+<https://element-hq.github.io/synapse/latest/reverse_proxy.html>`_.
 
 Upgrading an existing Synapse
 -----------------------------
@@ -52,7 +52,7 @@ The instructions for upgrading Synapse are in `the upgrade notes`_.
 Please check these instructions as upgrading may require extra steps for some
 versions of Synapse.
 
-.. _the upgrade notes: https://matrix-org.github.io/synapse/develop/upgrade.html
+.. _the upgrade notes: https://element-hq.github.io/synapse/develop/upgrade.html
 
 
 Platform dependencies
@@ -60,7 +60,7 @@ Platform dependencies
 
 Synapse uses a number of platform dependencies such as Python and PostgreSQL,
 and aims to follow supported upstream versions. See the
-`deprecation policy <https://matrix-org.github.io/synapse/latest/deprecation_policy.html>`_
+`deprecation policy <https://element-hq.github.io/synapse/latest/deprecation_policy.html>`_
 for more details.
 
 
@@ -114,7 +114,7 @@ from a web client.
 Unless you are running a test instance of Synapse on your local machine, in
 general, you will need to enable TLS support before you can successfully
 connect from a client: see
-`TLS certificates <https://matrix-org.github.io/synapse/latest/setup/installation.html#tls-certificates>`_.
+`TLS certificates <https://element-hq.github.io/synapse/latest/setup/installation.html#tls-certificates>`_.
 
 An easy way to get started is to login or register via Element at
 https://app.element.io/#/login or https://app.element.io/#/register respectively.
@@ -136,11 +136,11 @@ By default, registration of new users via Matrix clients is disabled. To enable
 it:
 
 1. In the
-   `registration config section <https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#registration>`_
+   `registration config section <https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#registration>`_
    set ``enable_registration: true`` in ``homeserver.yaml``.
 2. Then **either**:
 
-   a. set up a `CAPTCHA <https://matrix-org.github.io/synapse/latest/CAPTCHA_SETUP.html>`_, or
+   a. set up a `CAPTCHA <https://element-hq.github.io/synapse/latest/CAPTCHA_SETUP.html>`_, or
    b. set ``enable_registration_without_verification: true`` in ``homeserver.yaml``.
 
 We **strongly** recommend using a CAPTCHA, particularly if your homeserver is exposed to
@@ -162,9 +162,9 @@ desired ``localpart`` in the 'User name' box.
 Troubleshooting and support
 ===========================
 
-The `Admin FAQ <https://matrix-org.github.io/synapse/latest/usage/administration/admin_faq.html>`_
+The `Admin FAQ <https://element-hq.github.io/synapse/latest/usage/administration/admin_faq.html>`_
 includes tips on dealing with some common problems. For more details, see
-`Synapse's wider documentation <https://matrix-org.github.io/synapse/latest/>`_.
+`Synapse's wider documentation <https://element-hq.github.io/synapse/latest/>`_.
 
 For additional support installing or managing Synapse, please ask in the community
 support room |room|_ (from a matrix.org account if necessary). We do not use GitHub
@@ -211,15 +211,15 @@ Development
 
 We welcome contributions to Synapse from the community!
 The best place to get started is our
-`guide for contributors <https://matrix-org.github.io/synapse/latest/development/contributing_guide.html>`_.
-This is part of our larger `documentation <https://matrix-org.github.io/synapse/latest>`_, which includes
+`guide for contributors <https://element-hq.github.io/synapse/latest/development/contributing_guide.html>`_.
+This is part of our larger `documentation <https://element-hq.github.io/synapse/latest>`_, which includes
 
 information for Synapse developers as well as Synapse administrators.
 Developers might be particularly interested in:
 
-* `Synapse's database schema <https://matrix-org.github.io/synapse/latest/development/database_schema.html>`_,
-* `notes on Synapse's implementation details <https://matrix-org.github.io/synapse/latest/development/internal_documentation/index.html>`_, and
-* `how we use git <https://matrix-org.github.io/synapse/latest/development/git.html>`_.
+* `Synapse's database schema <https://element-hq.github.io/synapse/latest/development/database_schema.html>`_,
+* `notes on Synapse's implementation details <https://element-hq.github.io/synapse/latest/development/internal_documentation/index.html>`_, and
+* `how we use git <https://element-hq.github.io/synapse/latest/development/git.html>`_.
 
 Alongside all that, join our developer community on Matrix:
 `#synapse-dev:matrix.org <https://matrix.to/#/#synapse-dev:matrix.org>`_, featuring real humans!
@@ -235,7 +235,7 @@ Alongside all that, join our developer community on Matrix:
 
 .. |documentation| image:: https://img.shields.io/badge/documentation-%E2%9C%93-success
   :alt: (Rendered documentation on GitHub Pages)
-  :target: https://matrix-org.github.io/synapse/latest/
+  :target: https://element-hq.github.io/synapse/latest/
 
 .. |license| image:: https://img.shields.io/github/license/element-hq/synapse
   :alt: (check license in LICENSE file)
diff --git a/UPGRADE.rst b/UPGRADE.rst
index 6c7f9cb18e..f0843dd4bb 100644
--- a/UPGRADE.rst
+++ b/UPGRADE.rst
@@ -1,7 +1,7 @@
 Upgrading Synapse
 =================
 
-This document has moved to the `Synapse documentation website <https://matrix-org.github.io/synapse/latest/upgrade>`_.
+This document has moved to the `Synapse documentation website <https://element-hq.github.io/synapse/latest/upgrade>`_.
 Please update your links.
 
 The markdown source is available in `docs/upgrade.md <docs/upgrade.md>`_.
diff --git a/contrib/docker/docker-compose.yml b/contrib/docker/docker-compose.yml
index 5ac41139e3..36d5fd5309 100644
--- a/contrib/docker/docker-compose.yml
+++ b/contrib/docker/docker-compose.yml
@@ -7,8 +7,8 @@ services:
 
   synapse:
     build:
-        context: ../..
-        dockerfile: docker/Dockerfile
+      context: ../..
+      dockerfile: docker/Dockerfile
     image: docker.io/matrixdotorg/synapse:latest
     # Since synapse does not retry to connect to the database, restart upon
     # failure
@@ -57,7 +57,7 @@ services:
       - POSTGRES_USER=synapse
       - POSTGRES_PASSWORD=changeme
       # ensure the database gets created correctly
-      # https://matrix-org.github.io/synapse/latest/postgres.html#set-up-database
+      # https://element-hq.github.io/synapse/latest/postgres.html#set-up-database
       - POSTGRES_INITDB_ARGS=--encoding=UTF-8 --lc-collate=C --lc-ctype=C
     volumes:
       # You may store the database tables in a local folder..
diff --git a/contrib/docker_compose_workers/README.md b/contrib/docker_compose_workers/README.md
index ebb225fba6..81518f6ba1 100644
--- a/contrib/docker_compose_workers/README.md
+++ b/contrib/docker_compose_workers/README.md
@@ -69,7 +69,7 @@ redis:
   host: redis
   port: 6379
   # dbid:  <redis_logical_db_id>
-  # password: <secret_password>  
+  # password: <secret_password>
   # use_tls: True
   # certificate_file: <path_to_certificate>
   # private_key_file: <path_to_private_key>
@@ -113,4 +113,4 @@ federation_sender_instances:
 
 ## Other Worker types
 
-Using the concepts shown here it is possible to create other worker types in Docker Compose. See the [Workers](https://matrix-org.github.io/synapse/latest/workers.html#available-worker-applications) documentation for a list of available workers.
+Using the concepts shown here it is possible to create other worker types in Docker Compose. See the [Workers](https://element-hq.github.io/synapse/latest/workers.html#available-worker-applications) documentation for a list of available workers.
diff --git a/contrib/grafana/README.md b/contrib/grafana/README.md
index 0d4e1b59b2..0bbd57439e 100644
--- a/contrib/grafana/README.md
+++ b/contrib/grafana/README.md
@@ -1,6 +1,6 @@
 # Using the Synapse Grafana dashboard
 
 0. Set up Prometheus and Grafana. Out of scope for this readme. Useful documentation about using Grafana with Prometheus: http://docs.grafana.org/features/datasources/prometheus/
-1. Have your Prometheus scrape your Synapse. https://matrix-org.github.io/synapse/latest/metrics-howto.html
+1. Have your Prometheus scrape your Synapse. https://element-hq.github.io/synapse/latest/metrics-howto.html
 2. Import dashboard into Grafana. Download `synapse.json`. Import it to Grafana and select the correct Prometheus datasource. http://docs.grafana.org/reference/export_import/
 3. Set up required recording rules. [contrib/prometheus](../prometheus)
diff --git a/contrib/grafana/synapse.json b/contrib/grafana/synapse.json
index 188597c8dd..30d6d87500 100644
--- a/contrib/grafana/synapse.json
+++ b/contrib/grafana/synapse.json
@@ -4253,7 +4253,7 @@
             "type": "prometheus",
             "uid": "${DS_PROMETHEUS}"
           },
-          "description": "Triangular growth may indicate a problem with federation sending from the remote host --- but it may also be the case that everyone is asleep and no messages are being sent.\n\nSee https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#federation_metrics_domains",
+          "description": "Triangular growth may indicate a problem with federation sending from the remote host --- but it may also be the case that everyone is asleep and no messages are being sent.\n\nSee https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#federation_metrics_domains",
           "fieldConfig": {
             "defaults": {
               "color": {
@@ -4375,7 +4375,7 @@
             "type": "prometheus",
             "uid": "${DS_PROMETHEUS}"
           },
-          "description": "Triangular growth may indicate a problem with federation senders on the monitored instance---but it may also be the case that everyone is asleep and no messages are being sent.\n\nSee https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#federation_metrics_domains",
+          "description": "Triangular growth may indicate a problem with federation senders on the monitored instance---but it may also be the case that everyone is asleep and no messages are being sent.\n\nSee https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#federation_metrics_domains",
           "fieldConfig": {
             "defaults": {
               "color": {
diff --git a/contrib/lnav/README.md b/contrib/lnav/README.md
index 5230a191d2..2624b0ddf5 100644
--- a/contrib/lnav/README.md
+++ b/contrib/lnav/README.md
@@ -1,6 +1,6 @@
 # `lnav` config for Synapse logs
 
-[lnav](https://lnav.org/) is a log-viewing tool. It is particularly useful when 
+[lnav](https://lnav.org/) is a log-viewing tool. It is particularly useful when
 you need to interleave multiple log files, or for exploring a large log file
 with regex filters. The downside is that it is not as ubiquitous as tools like
 `less`, `grep`, etc.
@@ -9,7 +9,7 @@ This directory contains an `lnav` [log format definition](
     https://docs.lnav.org/en/v0.10.1/formats.html#defining-a-new-format
 ) for Synapse logs as
 emitted by Synapse with the default [logging configuration](
-    https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#log_config
+    https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#log_config
 ). It supports lnav 0.10.1 because that's what's packaged by my distribution.
 
 This should allow lnav:
@@ -36,12 +36,12 @@ Within lnav itself:
 
 - `?` for help within lnav itself.
 - `q` to quit.
-- `/` to search a-la `less` and `vim`, then `n` and `N` to continue searching 
+- `/` to search a-la `less` and `vim`, then `n` and `N` to continue searching
   down and up.
 - Use `o` and `O` to skip through logs based on the request ID (`POST-1234`, or
   else the value of the [`request_id_header`](
-    https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html?highlight=request_id_header#listeners
-  ) header). This may get confused if the same request ID is repeated among 
+    https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html?highlight=request_id_header#listeners
+  ) header). This may get confused if the same request ID is repeated among
   multiple files or process restarts.
 - ???
 - Profit
diff --git a/contrib/prometheus/README.md b/contrib/prometheus/README.md
index 4dbf648df8..dc1927f2ab 100644
--- a/contrib/prometheus/README.md
+++ b/contrib/prometheus/README.md
@@ -34,7 +34,7 @@ Add a new job to the main prometheus.yml file:
 ```
 
 An example of a Prometheus configuration with workers can be found in
-[metrics-howto.md](https://matrix-org.github.io/synapse/latest/metrics-howto.html).
+[metrics-howto.md](https://element-hq.github.io/synapse/latest/metrics-howto.html).
 
 To use `synapse.rules` add
 
diff --git a/contrib/purge_api/README.md b/contrib/purge_api/README.md
index 2f2e5c58cd..5c5b1bcb53 100644
--- a/contrib/purge_api/README.md
+++ b/contrib/purge_api/README.md
@@ -4,8 +4,8 @@ Purge history API examples
 # `purge_history.sh`
 
 A bash file, that uses the
-[purge history API](https://matrix-org.github.io/synapse/latest/admin_api/purge_history_api.html)
-to purge all messages in a list of rooms up to a certain event. You can select a 
+[purge history API](https://element-hq.github.io/synapse/latest/admin_api/purge_history_api.html)
+to purge all messages in a list of rooms up to a certain event. You can select a
 timeframe or a number of messages that you want to keep in the room.
 
 Just configure the variables DOMAIN, ADMIN, ROOMS_ARRAY and TIME at the top of
@@ -14,5 +14,5 @@ the script.
 # `purge_remote_media.sh`
 
 A bash file, that uses the
-[purge history API](https://matrix-org.github.io/synapse/latest/admin_api/purge_history_api.html)
+[purge history API](https://element-hq.github.io/synapse/latest/admin_api/purge_history_api.html)
 to purge all old cached remote media.
diff --git a/contrib/purge_api/purge_history.sh b/contrib/purge_api/purge_history.sh
index de58dcdbb7..9092f2e670 100644
--- a/contrib/purge_api/purge_history.sh
+++ b/contrib/purge_api/purge_history.sh
@@ -1,8 +1,8 @@
 #!/usr/bin/env bash
 
 # this script will use the api:
-#    https://matrix-org.github.io/synapse/latest/admin_api/purge_history_api.html
-# 
+#    https://element-hq.github.io/synapse/latest/admin_api/purge_history_api.html
+#
 # It will purge all messages in a list of rooms up to a cetrain event
 
 ###################################################################################################
@@ -77,9 +77,9 @@ TOKEN=$(sql "SELECT token FROM access_tokens WHERE user_id='$ADMIN' ORDER BY id
 AUTH="Authorization: Bearer $TOKEN"
 
 ###################################################################################################
-# check, if your TOKEN works. For example this works: 
+# check, if your TOKEN works. For example this works:
 ###################################################################################################
-# $ curl --header "$AUTH" "$API_URL/rooms/$ROOM/state/m.room.power_levels" 
+# $ curl --header "$AUTH" "$API_URL/rooms/$ROOM/state/m.room.power_levels"
 
 ###################################################################################################
 # finally start pruning the room:
@@ -117,13 +117,13 @@ for ROOM in "${ROOMS_ARRAY[@]}"; do
           sleep $SLEEP
           STATUS=$(curl --header "$AUTH" -s GET "$API_URL/admin/purge_history_status/$PURGE_ID" |grep status|cut -d'"' -f4)
           : "$ROOM --> Status: $STATUS"
-          [[ "$STATUS" == "active" ]] || break 
+          [[ "$STATUS" == "active" ]] || break
           SLEEP=$((SLEEP + 1))
-        done 
+        done
       fi
       set +x
       sleep 1
-    fi  
+    fi
 done
 
 
diff --git a/contrib/systemd-with-workers/README.md b/contrib/systemd-with-workers/README.md
index 9b19b042e9..717a8f5db6 100644
--- a/contrib/systemd-with-workers/README.md
+++ b/contrib/systemd-with-workers/README.md
@@ -1,3 +1,3 @@
 The documentation for using systemd to manage synapse workers is now part of
 the main synapse distribution. See
-[docs/systemd-with-workers](https://matrix-org.github.io/synapse/latest/systemd-with-workers/index.html).
+[docs/systemd-with-workers](https://element-hq.github.io/synapse/latest/systemd-with-workers/index.html).
diff --git a/contrib/systemd/README.md b/contrib/systemd/README.md
index 2844cbc8e0..d12d8ec37b 100644
--- a/contrib/systemd/README.md
+++ b/contrib/systemd/README.md
@@ -1,13 +1,13 @@
 # Setup Synapse with Systemd
-This is a setup for managing synapse with a user contributed systemd unit 
-file. It provides a `matrix-synapse` systemd unit file that should be tailored 
-to accommodate your installation in accordance with the installation 
+This is a setup for managing synapse with a user contributed systemd unit
+file. It provides a `matrix-synapse` systemd unit file that should be tailored
+to accommodate your installation in accordance with the installation
 instructions provided in
-[installation instructions](https://matrix-org.github.io/synapse/latest/setup/installation.html).
+[installation instructions](https://element-hq.github.io/synapse/latest/setup/installation.html).
 
 ## Setup
 1. Under the service section, ensure the `User` variable matches which user
-you installed synapse under and wish to run it as. 
+you installed synapse under and wish to run it as.
 2. Under the service section, ensure the `WorkingDirectory` variable matches
 where you have installed synapse.
 3. Under the service section, ensure the `ExecStart` variable matches the
diff --git a/docker/README-testing.md b/docker/README-testing.md
index 21b99963d8..db88598b8c 100644
--- a/docker/README-testing.md
+++ b/docker/README-testing.md
@@ -15,7 +15,7 @@ and run Synapse against Complement.
 Consult the [contributing guide][guideComplementSh] for instructions on how to use it.
 
 
-[guideComplementSh]: https://matrix-org.github.io/synapse/latest/development/contributing_guide.html#run-the-integration-tests-complement
+[guideComplementSh]: https://element-hq.github.io/synapse/latest/development/contributing_guide.html#run-the-integration-tests-complement
 
 ## Building and running the images manually
 
diff --git a/docker/README.md b/docker/README.md
index eff28b9546..3db202f893 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -45,7 +45,7 @@ docker run -it --rm \
 ```
 
 For information on picking a suitable server name, see
-https://matrix-org.github.io/synapse/latest/setup/installation.html.
+https://element-hq.github.io/synapse/latest/setup/installation.html.
 
 The above command will generate a `homeserver.yaml` in (typically)
 `/var/lib/docker/volumes/synapse-data/_data`. You should check this file, and
@@ -154,7 +154,7 @@ For documentation on using a reverse proxy, see
 https://github.com/element.-hq/synapse/blob/master/docs/reverse_proxy.md.
 
 For more information on enabling TLS support in synapse itself, see
-https://matrix-org.github.io/synapse/latest/setup/installation.html#tls-certificates. Of
+https://element-hq.github.io/synapse/latest/setup/installation.html#tls-certificates. Of
 course, you will need to expose the TLS port from the container with a `-p`
 argument to `docker run`.
 
@@ -242,4 +242,4 @@ healthcheck:
 
 Jemalloc is embedded in the image and will be used instead of the default allocator.
 You can read about jemalloc by reading the Synapse
-[Admin FAQ](https://matrix-org.github.io/synapse/latest/usage/administration/admin_faq.html#help-synapse-is-slow-and-eats-all-my-ramcpu).
+[Admin FAQ](https://element-hq.github.io/synapse/latest/usage/administration/admin_faq.html#help-synapse-is-slow-and-eats-all-my-ramcpu).
diff --git a/docs/.sample_config_header.yaml b/docs/.sample_config_header.yaml
index 2355337e6d..adba60a4fa 100644
--- a/docs/.sample_config_header.yaml
+++ b/docs/.sample_config_header.yaml
@@ -1,12 +1,11 @@
 # This file is maintained as an up-to-date snapshot of the default
 # homeserver.yaml configuration generated by Synapse. You can find a
 # complete accounting of possible configuration options at
-# https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html
+# https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html
 #
 # It is *not* intended to be copied and used as the basis for a real
 # homeserver.yaml. Instead, if you are starting from scratch, please generate
 # a fresh config using Synapse by following the instructions in
-# https://matrix-org.github.io/synapse/latest/setup/installation.html.
+# https://element-hq.github.io/synapse/latest/setup/installation.html.
 #
 ################################################################################
-
diff --git a/docs/README.md b/docs/README.md
index 5222ee5f03..0b2b910c73 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -1,13 +1,13 @@
 # Synapse Documentation
 
-**The documentation is currently hosted [here](https://matrix-org.github.io/synapse).**
+**The documentation is currently hosted [here](https://element-hq.github.io/synapse).**
 Please update any links to point to the new website instead.
 
 ## About
 
 This directory currently holds a series of markdown files documenting how to install, use
-and develop Synapse. The documentation is readable directly from this repository, but it is 
-recommended to instead browse through the [website](https://matrix-org.github.io/synapse) for 
+and develop Synapse. The documentation is readable directly from this repository, but it is
+recommended to instead browse through the [website](https://element-hq.github.io/synapse) for
 easier discoverability.
 
 ## Adding to the documentation
@@ -50,7 +50,7 @@ build the documentation with:
 mdbook build
 ```
 
-The rendered contents will be outputted to a new `book/` directory at the root of the repository. Please note that 
+The rendered contents will be outputted to a new `book/` directory at the root of the repository. Please note that
 index.html is not built by default, it is created by copying over the file `welcome_and_overview.html` to `index.html`
 during deployment. Thus, when running `mdbook serve` locally the book will initially show a 404 in place of the index
 due to the above. Do not be alarmed!
diff --git a/docs/admin_api/README.rst b/docs/admin_api/README.rst
index 8d6e76580a..db141732f9 100644
--- a/docs/admin_api/README.rst
+++ b/docs/admin_api/README.rst
@@ -1,7 +1,7 @@
 Admin APIs
 ==========
 
-**Note**: The latest documentation can be viewed `here <https://matrix-org.github.io/synapse>`_.
+**Note**: The latest documentation can be viewed `here <https://element-hq.github.io/synapse>`_.
 See `docs/README.md <../README.md>`_ for more information.
 
 **Please update links to point to the website instead.** Existing files in this directory
@@ -11,4 +11,3 @@ This directory includes documentation for the various synapse specific admin
 APIs available. Updates to the existing Admin API documentation should still
 be made to these files, but any new documentation files should instead be placed under
 `docs/usage/administration/admin_api <../usage/administration/admin_api>`_.
-
diff --git a/docs/development/demo.md b/docs/development/demo.md
index 893ed6998e..f78f5f1c0a 100644
--- a/docs/development/demo.md
+++ b/docs/development/demo.md
@@ -2,7 +2,7 @@
 
 **DO NOT USE THESE DEMO SERVERS IN PRODUCTION**
 
-Requires you to have a [Synapse development environment setup](https://matrix-org.github.io/synapse/develop/development/contributing_guide.html#4-install-the-dependencies).
+Requires you to have a [Synapse development environment setup](https://element-hq.github.io/synapse/develop/development/contributing_guide.html#4-install-the-dependencies).
 
 The demo setup allows running three federation Synapse servers, with server
 names `localhost:8480`, `localhost:8481`, and `localhost:8482`.
diff --git a/docs/federate.md b/docs/federate.md
index df4c87da51..cfbfd16ff8 100644
--- a/docs/federate.md
+++ b/docs/federate.md
@@ -54,7 +54,7 @@ in the HTTP library used by Synapse, 308 redirects are currently not followed by
 federating servers, which can cause `M_UNKNOWN` or `401 Unauthorized` errors. This
 may affect users who are redirecting apex-to-www (e.g. `example.com` -> `www.example.com`),
 and especially users of the Kubernetes *Nginx Ingress* module, which uses 308 redirect
-codes by default. For those Kubernetes users, [this Stackoverflow post](https://stackoverflow.com/a/52617528/5096871) 
+codes by default. For those Kubernetes users, [this Stackoverflow post](https://stackoverflow.com/a/52617528/5096871)
 might be helpful. For other users, switching to a `301 Moved Permanently` code may be
 an option. 308 redirect codes will be supported properly in a future
 release of Synapse.
@@ -64,4 +64,4 @@ release of Synapse.
 If you want to get up and running quickly with a trio of homeservers in a
 private federation, there is a script in the `demo` directory. This is mainly
 useful just for development purposes. See
-[demo scripts](https://matrix-org.github.io/synapse/develop/development/demo.html).
+[demo scripts](https://element-hq.github.io/synapse/develop/development/demo.html).
diff --git a/docs/modules/third_party_rules_callbacks.md b/docs/modules/third_party_rules_callbacks.md
index 4a27d976fb..d06bff25eb 100644
--- a/docs/modules/third_party_rules_callbacks.md
+++ b/docs/modules/third_party_rules_callbacks.md
@@ -224,7 +224,7 @@ wishing this callback to be called on every profile change are encouraged to dis
 per-room profiles globally using the `allow_per_room_profiles` configuration setting in
 Synapse's configuration file.
 This callback is not called when registering a user, even when setting it through the
-[`get_displayname_for_registration`](https://matrix-org.github.io/synapse/latest/modules/password_auth_provider_callbacks.html#get_displayname_for_registration)
+[`get_displayname_for_registration`](https://element-hq.github.io/synapse/latest/modules/password_auth_provider_callbacks.html#get_displayname_for_registration)
 module callback.
 
 If multiple modules implement this callback, Synapse runs them all in order.
@@ -343,4 +343,4 @@ class EventCensorer:
         )
         event_dict["content"] = new_event_content
         return event_dict
-```
\ No newline at end of file
+```
diff --git a/docs/modules/writing_a_module.md b/docs/modules/writing_a_module.md
index f1b2bef3fa..f687deb2cb 100644
--- a/docs/modules/writing_a_module.md
+++ b/docs/modules/writing_a_module.md
@@ -82,7 +82,7 @@ the callback name as the argument name and the function as its value. A
 `register_[...]_callbacks` method exists for each category.
 
 Callbacks for each category can be found on their respective page of the
-[Synapse documentation website](https://matrix-org.github.io/synapse).
+[Synapse documentation website](https://element-hq.github.io/synapse).
 
 ## Caching
 
diff --git a/docs/sample_config.yaml b/docs/sample_config.yaml
index 6578ec0229..0d75e6d4a1 100644
--- a/docs/sample_config.yaml
+++ b/docs/sample_config.yaml
@@ -1,12 +1,12 @@
 # This file is maintained as an up-to-date snapshot of the default
 # homeserver.yaml configuration generated by Synapse. You can find a
 # complete accounting of possible configuration options at
-# https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html
+# https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html
 #
 # It is *not* intended to be copied and used as the basis for a real
 # homeserver.yaml. Instead, if you are starting from scratch, please generate
 # a fresh config using Synapse by following the instructions in
-# https://matrix-org.github.io/synapse/latest/setup/installation.html.
+# https://element-hq.github.io/synapse/latest/setup/installation.html.
 #
 ################################################################################
 
@@ -20,7 +20,7 @@
 #
 # For more information on how to configure Synapse, including a complete accounting of
 # each option, go to docs/usage/configuration/config_documentation.md or
-# https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html
+# https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html
 server_name: "SERVERNAME"
 pid_file: DATADIR/homeserver.pid
 listeners:
diff --git a/docs/sample_log_config.yaml b/docs/sample_log_config.yaml
index ae0318122e..dcbe88854c 100644
--- a/docs/sample_log_config.yaml
+++ b/docs/sample_log_config.yaml
@@ -7,7 +7,7 @@
 # be ingested by ELK stacks. See [2] for details.
 #
 # [1]: https://docs.python.org/3/library/logging.config.html#configuration-dictionary-schema
-# [2]: https://matrix-org.github.io/synapse/latest/structured_logging.html
+# [2]: https://element-hq.github.io/synapse/latest/structured_logging.html
 
 version: 1
 
diff --git a/docs/upgrade.md b/docs/upgrade.md
index 11f3d9c783..355601cedb 100644
--- a/docs/upgrade.md
+++ b/docs/upgrade.md
@@ -144,9 +144,9 @@ packages or Docker images, no action is required.
 As mentioned previously in [Upgrading to v1.84.0](#upgrading-to-v1840), the following deprecated settings
 are being removed in this release of Synapse:
 
-* [`worker_replication_host`](https://matrix-org.github.io/synapse/v1.86/usage/configuration/config_documentation.html#worker_replication_host)
-* [`worker_replication_http_port`](https://matrix-org.github.io/synapse/v1.86/usage/configuration/config_documentation.html#worker_replication_http_port)
-* [`worker_replication_http_tls`](https://matrix-org.github.io/synapse/v1.86/usage/configuration/config_documentation.html#worker_replication_http_tls)
+* [`worker_replication_host`](https://element-hq.github.io/synapse/v1.86/usage/configuration/config_documentation.html#worker_replication_host)
+* [`worker_replication_http_port`](https://element-hq.github.io/synapse/v1.86/usage/configuration/config_documentation.html#worker_replication_http_port)
+* [`worker_replication_http_tls`](https://element-hq.github.io/synapse/v1.86/usage/configuration/config_documentation.html#worker_replication_http_tls)
 
 Please ensure that you have migrated to using `main` on your shared configuration's `instance_map`
 (or create one if necessary). This is required if you have ***any*** workers at all;
@@ -499,7 +499,7 @@ the names of Prometheus metrics.
 If you want to test your changes before legacy names are disabled by default,
 you may specify `enable_legacy_metrics: false` in your homeserver configuration.
 
-A list of affected metrics is available on the [Metrics How-to page](https://matrix-org.github.io/synapse/v1.69/metrics-howto.html?highlight=metrics%20deprecated#renaming-of-metrics--deprecation-of-old-names-in-12).
+A list of affected metrics is available on the [Metrics How-to page](https://element-hq.github.io/synapse/v1.69/metrics-howto.html?highlight=metrics%20deprecated#renaming-of-metrics--deprecation-of-old-names-in-12).
 
 
 ## Deprecation of the `generate_short_term_login_token` module API method
@@ -556,7 +556,7 @@ are not affected.
 
 Building from a source checkout of Synapse now requires a recent Rust compiler
 (currently Rust 1.58.1, but see also the
-[Platform Dependency Policy](https://matrix-org.github.io/synapse/latest/deprecation_policy.html)).
+[Platform Dependency Policy](https://element-hq.github.io/synapse/latest/deprecation_policy.html)).
 
 Installations using
 
@@ -626,7 +626,7 @@ homeserver administrators more notice of the change.
 To continue to allow users to add email addresses to their homeserver accounts,
 and perform password resets, make sure that Synapse is configured with a working
 email server in the [`email` configuration
-section](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#email)
+section](https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#email)
 (including, at a minimum, a `notif_from` setting.)
 
 Specifying an `email` setting under `account_threepid_delegates` will now cause
@@ -639,7 +639,7 @@ an error at startup.
 Synapse v1.66.0 will remove the ability to delegate the tasks of verifying email address ownership, and password reset confirmation, to an identity server.
 
 If you require your homeserver to verify e-mail addresses or to support password resets via e-mail, please configure your homeserver with SMTP access so that it can send e-mails on its own behalf.
-[Consult the configuration documentation for more information.](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#email)
+[Consult the configuration documentation for more information.](https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#email)
 
 The option that will be removed is `account_threepid_delegates.email`.
 
@@ -849,7 +849,7 @@ The names of user devices are no longer visible to users on other homeservers by
 Device IDs are unaffected, as these are necessary to facilitate end-to-end encryption.
 
 To re-enable this functionality, set the
-[`allow_device_name_lookup_over_federation`](https://matrix-org.github.io/synapse/v1.59/usage/configuration/config_documentation.html#federation)
+[`allow_device_name_lookup_over_federation`](https://element-hq.github.io/synapse/v1.59/usage/configuration/config_documentation.html#federation)
 homeserver config option to `true`.
 
 
@@ -968,7 +968,7 @@ experimental_features:
 
 Synapse now refuses to start when using PostgreSQL with non-`C` values for `COLLATE` and
 `CTYPE` unless the config flag `allow_unsafe_locale`, found in the database section of
-the configuration file, is set to `true`. See the [PostgreSQL documentation](https://matrix-org.github.io/synapse/latest/postgres.html#fixing-incorrect-collate-or-ctype)
+the configuration file, is set to `true`. See the [PostgreSQL documentation](https://element-hq.github.io/synapse/latest/postgres.html#fixing-incorrect-collate-or-ctype)
 for more information and instructions on how to fix a database with incorrect values.
 
 # Upgrading to v1.55.0
@@ -1007,7 +1007,7 @@ please upgrade Mjolnir to version 1.3.2 or later before upgrading Synapse.
 This release removes support for the `structured: true` logging configuration
 which was deprecated in Synapse v1.23.0. If your logging configuration contains
 `structured: true` then it should be modified based on the
-[structured logging documentation](https://matrix-org.github.io/synapse/v1.56/structured_logging.html#upgrading-from-legacy-structured-logging-configuration).
+[structured logging documentation](https://element-hq.github.io/synapse/v1.56/structured_logging.html#upgrading-from-legacy-structured-logging-configuration).
 
 # Upgrading to v1.53.0
 
@@ -1067,10 +1067,10 @@ are now active by default.
 As announced with the release of [Synapse 1.47.0](#deprecation-of-the-user_may_create_room_with_invites-module-callback),
 the deprecated `user_may_create_room_with_invites` module callback has been removed.
 
-Modules relying on it can instead implement [`user_may_invite`](https://matrix-org.github.io/synapse/latest/modules/spam_checker_callbacks.html#user_may_invite)
+Modules relying on it can instead implement [`user_may_invite`](https://element-hq.github.io/synapse/latest/modules/spam_checker_callbacks.html#user_may_invite)
 and use the [`get_room_state`](https://github.com/element.-hq/synapse/blob/872f23b95fa980a61b0866c1475e84491991fa20/synapse/module_api/__init__.py#L869-L876)
 module API to infer whether the invite is happening while creating a room (see [this function](https://github.com/matrix-org/synapse-domain-rule-checker/blob/e7d092dd9f2a7f844928771dbfd9fd24c2332e48/synapse_domain_rule_checker/__init__.py#L56-L89)
-as an example). Alternately, modules can also implement [`on_create_room`](https://matrix-org.github.io/synapse/latest/modules/third_party_rules_callbacks.html#on_create_room).
+as an example). Alternately, modules can also implement [`on_create_room`](https://element-hq.github.io/synapse/latest/modules/third_party_rules_callbacks.html#on_create_room).
 
 
 # Upgrading to v1.52.0
@@ -1117,13 +1117,13 @@ The following admin APIs were deprecated in [Synapse 1.34](https://github.com/ma
 - `POST /_synapse/admin/v1/<room_id>/delete`
 
 Any scripts still using the above APIs should be converted to use the
-[Delete Room API](https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#delete-room-api).
+[Delete Room API](https://element-hq.github.io/synapse/latest/admin_api/rooms.html#delete-room-api).
 
 ## Deprecation of the `user_may_create_room_with_invites` module callback
 
 The `user_may_create_room_with_invites` is deprecated and will be removed in a future
 version of Synapse. Modules implementing this callback can instead implement
-[`user_may_invite`](https://matrix-org.github.io/synapse/latest/modules/spam_checker_callbacks.html#user_may_invite)
+[`user_may_invite`](https://element-hq.github.io/synapse/latest/modules/spam_checker_callbacks.html#user_may_invite)
 and use the [`get_room_state`](https://github.com/element.-hq/synapse/blob/872f23b95fa980a61b0866c1475e84491991fa20/synapse/module_api/__init__.py#L869-L876)
 module API method to infer whether the invite is happening in the context of creating a
 room.
@@ -1150,7 +1150,7 @@ deleted from any configured storage providers to reclaim space.
 
 ## The spaces summary APIs can now be handled by workers
 
-The [available worker applications documentation](https://matrix-org.github.io/synapse/latest/workers.html#available-worker-applications)
+The [available worker applications documentation](https://element-hq.github.io/synapse/latest/workers.html#available-worker-applications)
 has been updated to reflect that calls to the `/spaces`, `/hierarchy`, and
 `/summary` endpoints can now be routed to workers for both client API and
 federation requests.
@@ -1166,7 +1166,7 @@ The following admin APIs were deprecated in [Synapse 1.25](https://github.com/ma
 -   `POST /_synapse/admin/v1/shutdown_room/<room_id>`
 
 Any scripts still using the above APIs should be converted to use the
-[Delete Room API](https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#delete-room-api).
+[Delete Room API](https://element-hq.github.io/synapse/latest/admin_api/rooms.html#delete-room-api).
 
 ## User-interactive authentication fallback templates can now display errors
 
@@ -1214,14 +1214,14 @@ The `template_dir` settings in the `sso`, `account_validity` and `email` section
 configuration file are now deprecated. Server admins should use the new
 `templates.custom_template_directory` setting in the configuration file and use one single
 custom template directory for all aforementioned features. Template file names remain
-unchanged. See [the related documentation](https://matrix-org.github.io/synapse/latest/templates.html)
+unchanged. See [the related documentation](https://element-hq.github.io/synapse/latest/templates.html)
 for more information and examples.
 
 We plan to remove support for these settings in October 2021.
 
 ## `/_synapse/admin/v1/users/{userId}/media` must be handled by media workers
 
-The [media repository worker documentation](https://matrix-org.github.io/synapse/latest/workers.html#synapseappmedia_repository)
+The [media repository worker documentation](https://element-hq.github.io/synapse/latest/workers.html#synapseappmedia_repository)
 has been updated to reflect that calls to `/_synapse/admin/v1/users/{userId}/media`
 must now be handled by media repository workers. This is due to the new `DELETE` method
 of this endpoint modifying the media store.
@@ -1624,7 +1624,7 @@ lock down external access to the Admin API endpoints.
 This release deprecates use of the `structured: true` logging
 configuration for structured logging. If your logging configuration
 contains `structured: true` then it should be modified based on the
-[structured logging documentation](https://matrix-org.github.io/synapse/v1.56/structured_logging.html#upgrading-from-legacy-structured-logging-configuration).
+[structured logging documentation](https://element-hq.github.io/synapse/v1.56/structured_logging.html#upgrading-from-legacy-structured-logging-configuration).
 
 The `structured` and `drains` logging options are now deprecated and
 should be replaced by standard logging configuration of `handlers` and
@@ -1724,7 +1724,7 @@ updated.
 When setting up worker processes, we now recommend the use of a Redis
 server for replication. **The old direct TCP connection method is
 deprecated and will be removed in a future release.** See
-the [worker documentation](https://matrix-org.github.io/synapse/v1.66/workers.html) for more details.
+the [worker documentation](https://element-hq.github.io/synapse/v1.66/workers.html) for more details.
 
 # Upgrading to v1.14.0
 
diff --git a/docs/usage/administration/request_log.md b/docs/usage/administration/request_log.md
index 295104bef0..a9b1f30191 100644
--- a/docs/usage/administration/request_log.md
+++ b/docs/usage/administration/request_log.md
@@ -19,7 +19,7 @@ See the following for how to decode the dense data available from the default lo
 | EEEE  | Request Identifier (This identifier is shared by related log lines)|
 | FFFF  | Source IP (Or X-Forwarded-For if enabled) |
 | GGGG  | Server Port |
-| HHHH  | Federated Server or Local User making request (blank if unauthenticated or not supplied).<br/>If this is of the form `@aaa:example.com|@bbb:example.com`, then that means that `@aaa:example.com` is authenticated but they are controlling `@bbb:example.com`, e.g. if `aaa` is controlling `bbb` [via the admin API](https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#login-as-a-user). |
+| HHHH  | Federated Server or Local User making request (blank if unauthenticated or not supplied).<br/>If this is of the form `@aaa:example.com|@bbb:example.com`, then that means that `@aaa:example.com` is authenticated but they are controlling `@bbb:example.com`, e.g. if `aaa` is controlling `bbb` [via the admin API](https://element-hq.github.io/synapse/latest/admin_api/user_admin_api.html#login-as-a-user). |
 | IIII  | Total Time to process the request |
 | JJJJ  | Time to send response over network once generated (this may be negative if the socket is closed before the response is generated)|
 | KKKK  | Userland CPU time |
diff --git a/docs/usage/configuration/config_documentation.md b/docs/usage/configuration/config_documentation.md
index 9aa705d6ac..618f6eb9ce 100644
--- a/docs/usage/configuration/config_documentation.md
+++ b/docs/usage/configuration/config_documentation.md
@@ -549,7 +549,7 @@ listeners:
   # that unwraps TLS.
   #
   # If you plan to use a reverse proxy, please see
-  # https://matrix-org.github.io/synapse/latest/reverse_proxy.html.
+  # https://element-hq.github.io/synapse/latest/reverse_proxy.html.
   #
   - port: 8008
     tls: false
@@ -581,7 +581,7 @@ listeners:
   # conflicts, and providing enhanced security through system file permissions.
   #
   # Note that x_forwarded will default to true, when using a UNIX socket. Please see
-  # https://matrix-org.github.io/synapse/latest/reverse_proxy.html.
+  # https://element-hq.github.io/synapse/latest/reverse_proxy.html.
   #
   - path: /run/synapse/main_public.sock
     type: http
diff --git a/scripts-dev/check-newsfragment.sh b/scripts-dev/check-newsfragment.sh
index effea0929c..8182d13a72 100755
--- a/scripts-dev/check-newsfragment.sh
+++ b/scripts-dev/check-newsfragment.sh
@@ -19,7 +19,7 @@ if ! git diff --quiet FETCH_HEAD... -- debian; then
     if git diff --quiet FETCH_HEAD... -- debian/changelog; then
         echo "Updates to debian directory, but no update to the changelog." >&2
         echo "!! Please see the contributing guide for help writing your changelog entry:" >&2
-        echo "https://matrix-org.github.io/synapse/latest/development/contributing_guide.html#debian-changelog" >&2
+        echo "https://element-hq.github.io/synapse/latest/development/contributing_guide.html#debian-changelog" >&2
         exit 1
     fi
 fi
@@ -32,7 +32,7 @@ fi
 
 # Print a link to the contributing guide if the user makes a mistake
 CONTRIBUTING_GUIDE_TEXT="!! Please see the contributing guide for help writing your changelog entry:
-https://matrix-org.github.io/synapse/latest/development/contributing_guide.html#changelog"
+https://element-hq.github.io/synapse/latest/development/contributing_guide.html#changelog"
 
 # If check-newsfragment returns a non-zero exit code, print the contributing guide and exit
 python -m towncrier.check --compare-with=origin/develop || (echo -e "$CONTRIBUTING_GUIDE_TEXT" >&2 && exit 1)
diff --git a/synapse/config/_base.py b/synapse/config/_base.py
index a370874fb1..f7fc2faf72 100644
--- a/synapse/config/_base.py
+++ b/synapse/config/_base.py
@@ -132,7 +132,7 @@ CONFIG_FILE_HEADER = """\
 #
 # For more information on how to configure Synapse, including a complete accounting of
 # each option, go to docs/usage/configuration/config_documentation.md or
-# https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html
+# https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html
 """
 
 
diff --git a/synapse/config/account_validity.py b/synapse/config/account_validity.py
index 13db69c33b..ef6b953f4b 100644
--- a/synapse/config/account_validity.py
+++ b/synapse/config/account_validity.py
@@ -30,7 +30,7 @@ This server's configuration file is using the deprecated 'template_dir' setting
 'account_validity' section. Support for this setting has been deprecated and will be
 removed in a future version of Synapse. Server admins should instead use the new
 'custom_template_directory' setting documented here:
-https://matrix-org.github.io/synapse/latest/templates.html
+https://element-hq.github.io/synapse/latest/templates.html
 ---------------------------------------------------------------------------------------"""
 
 
diff --git a/synapse/config/api.py b/synapse/config/api.py
index 50ccfdabab..d26193ff52 100644
--- a/synapse/config/api.py
+++ b/synapse/config/api.py
@@ -79,7 +79,7 @@ _ROOM_INVITE_STATE_TYPES_WARNING = """\
 WARNING: The 'room_invite_state_types' configuration setting is now deprecated,
 and replaced with 'room_prejoin_state'. New features may not work correctly
 unless 'room_invite_state_types' is removed. See the config documentation at
-    https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#room_prejoin_state
+    https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#room_prejoin_state
 for details of 'room_prejoin_state'.
 --------------------------------------------------------------------------------
 """
diff --git a/synapse/config/emailconfig.py b/synapse/config/emailconfig.py
index 7dadaa5843..f58bb062fe 100644
--- a/synapse/config/emailconfig.py
+++ b/synapse/config/emailconfig.py
@@ -57,7 +57,7 @@ This server's configuration file is using the deprecated 'template_dir' setting
 'email' section. Support for this setting has been deprecated and will be removed in a
 future version of Synapse. Server admins should instead use the new
 'custom_template_directory' setting documented here:
-https://matrix-org.github.io/synapse/latest/templates.html
+https://element-hq.github.io/synapse/latest/templates.html
 ---------------------------------------------------------------------------------------"""
 
 
diff --git a/synapse/config/logger.py b/synapse/config/logger.py
index 3a1a307b05..cb01ac5170 100644
--- a/synapse/config/logger.py
+++ b/synapse/config/logger.py
@@ -60,7 +60,7 @@ DEFAULT_LOG_CONFIG = Template(
 # be ingested by ELK stacks. See [2] for details.
 #
 # [1]: https://docs.python.org/3/library/logging.config.html#configuration-dictionary-schema
-# [2]: https://matrix-org.github.io/synapse/latest/structured_logging.html
+# [2]: https://element-hq.github.io/synapse/latest/structured_logging.html
 
 version: 1
 
@@ -138,7 +138,7 @@ removed in Synapse 1.3.0. You should instead set up a separate log configuration
 STRUCTURED_ERROR = """\
 Support for the structured configuration option was removed in Synapse 1.54.0.
 You should instead use the standard logging configuration. See
-https://matrix-org.github.io/synapse/v1.54/structured_logging.html
+https://element-hq.github.io/synapse/v1.54/structured_logging.html
 """
 
 
diff --git a/synapse/config/server.py b/synapse/config/server.py
index 182ecc1c9c..98421b5ee4 100644
--- a/synapse/config/server.py
+++ b/synapse/config/server.py
@@ -45,7 +45,7 @@ logger = logging.Logger(__name__)
 DIRECT_TCP_ERROR = """
 Using direct TCP replication for workers is no longer supported.
 
-Please see https://matrix-org.github.io/synapse/latest/upgrade.html#direct-tcp-replication-is-no-longer-supported-migrate-to-redis
+Please see https://element-hq.github.io/synapse/latest/upgrade.html#direct-tcp-replication-is-no-longer-supported-migrate-to-redis
 """
 
 # by default, we attempt to listen on both '::' *and* '0.0.0.0' because some OSes
@@ -168,7 +168,7 @@ ROOM_COMPLEXITY_TOO_GREAT = (
 METRICS_PORT_WARNING = """\
 The metrics_port configuration option is deprecated in Synapse 0.31 in favour of
 a listener. Please see
-https://matrix-org.github.io/synapse/latest/metrics-howto.html
+https://element-hq.github.io/synapse/latest/metrics-howto.html
 on how to configure the new listener.
 --------------------------------------------------------------------------------"""
 
diff --git a/synapse/config/spam_checker.py b/synapse/config/spam_checker.py
index 636421c56e..014c55d702 100644
--- a/synapse/config/spam_checker.py
+++ b/synapse/config/spam_checker.py
@@ -33,7 +33,7 @@ LEGACY_SPAM_CHECKER_WARNING = """
 This server is using a spam checker module that is implementing the deprecated spam
 checker interface. Please check with the module's maintainer to see if a new version
 supporting Synapse's generic modules system is available. For more information, please
-see https://matrix-org.github.io/synapse/latest/modules/index.html
+see https://element-hq.github.io/synapse/latest/modules/index.html
 ---------------------------------------------------------------------------------------"""
 
 
diff --git a/synapse/config/sso.py b/synapse/config/sso.py
index 16e54478e7..8781e3fef8 100644
--- a/synapse/config/sso.py
+++ b/synapse/config/sso.py
@@ -33,7 +33,7 @@ This server's configuration file is using the deprecated 'template_dir' setting
 'sso' section. Support for this setting has been deprecated and will be removed in a
 future version of Synapse. Server admins should instead use the new
 'custom_template_directory' setting documented here:
-https://matrix-org.github.io/synapse/latest/templates.html
+https://element-hq.github.io/synapse/latest/templates.html
 ---------------------------------------------------------------------------------------"""
 
 
diff --git a/synapse/config/workers.py b/synapse/config/workers.py
index a0648c965f..d3bcdc7949 100644
--- a/synapse/config/workers.py
+++ b/synapse/config/workers.py
@@ -54,13 +54,13 @@ _MISSING_MAIN_PROCESS_INSTANCE_MAP_DATA = """
 Missing data for a worker to connect to main process. Please include '%s' in the
 `instance_map` declared in your shared yaml configuration as defined in configuration
 documentation here:
-`https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#instance_map`
+`https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#instance_map`
 """
 
 WORKER_REPLICATION_SETTING_DEPRECATED_MESSAGE = """
 '%s' is no longer a supported worker setting, please place '%s' onto your shared
 configuration under `main` inside the `instance_map`. See workers documentation here:
-`https://matrix-org.github.io/synapse/latest/workers.html#worker-configuration`
+`https://element-hq.github.io/synapse/latest/workers.html#worker-configuration`
 """
 
 # This allows for a handy knob when it's time to change from 'master' to
diff --git a/synapse/events/__init__.py b/synapse/events/__init__.py
index 0e78d5a3f4..80e17f0fb0 100644
--- a/synapse/events/__init__.py
+++ b/synapse/events/__init__.py
@@ -235,7 +235,7 @@ class _EventInternalMetadata:
         processed as if they're new regular events (e.g. updating membership state in
         the database, relaying to clients via /sync, etc) despite being outliers.
 
-        See also https://matrix-org.github.io/synapse/develop/development/room-dag-concepts.html#out-of-band-membership-events.
+        See also https://element-hq.github.io/synapse/develop/development/room-dag-concepts.html#out-of-band-membership-events.
 
         (Added in synapse 0.99.0, so may be unreliable for events received before that)
         """
diff --git a/synapse/module_api/__init__.py b/synapse/module_api/__init__.py
index f7ad0993a0..4214c52515 100644
--- a/synapse/module_api/__init__.py
+++ b/synapse/module_api/__init__.py
@@ -1269,7 +1269,7 @@ class ModuleApi:
             f: The function to call repeatedly. f can be either synchronous or
                 asynchronous, and must follow Synapse's logcontext rules.
                 More info about logcontexts is available at
-                https://matrix-org.github.io/synapse/latest/log_contexts.html
+                https://element-hq.github.io/synapse/latest/log_contexts.html
             msec: How long to wait between calls in milliseconds.
             *args: Positional arguments to pass to function.
             desc: The background task's description. Default to the function's name.
@@ -1325,7 +1325,7 @@ class ModuleApi:
             f: The function to call once. f can be either synchronous or
                 asynchronous, and must follow Synapse's logcontext rules.
                 More info about logcontexts is available at
-                https://matrix-org.github.io/synapse/latest/log_contexts.html
+                https://element-hq.github.io/synapse/latest/log_contexts.html
             *args: Positional arguments to pass to function.
             desc: The background task's description. Default to the function's name.
             **kwargs: Keyword arguments to pass to function.
diff --git a/synapse/storage/schema/README.md b/synapse/storage/schema/README.md
index 4fc2061a3d..fa4d79908d 100644
--- a/synapse/storage/schema/README.md
+++ b/synapse/storage/schema/README.md
@@ -1,4 +1,4 @@
 # Synapse Database Schemas
 
 This directory contains the schema files used to build Synapse databases. For more
-information, see https://matrix-org.github.io/synapse/develop/development/database_schema.html.
+information, see https://element-hq.github.io/synapse/develop/development/database_schema.html.
diff --git a/synapse/storage/schema/__init__.py b/synapse/storage/schema/__init__.py
index c8aec2f69d..132c781f51 100644
--- a/synapse/storage/schema/__init__.py
+++ b/synapse/storage/schema/__init__.py
@@ -25,7 +25,7 @@ This should be incremented whenever the codebase changes its requirements on the
 shape of the database schema (even if those requirements are backwards-compatible with
 older versions of Synapse).
 
-See https://matrix-org.github.io/synapse/develop/development/database_schema.html
+See https://element-hq.github.io/synapse/develop/development/database_schema.html
 for more information on how this works.
 
 Changes in SCHEMA_VERSION = 61: