1 files changed, 69 insertions, 7 deletions
diff --git a/docs/admin_api/media_admin_api.md b/docs/admin_api/media_admin_api.md
index 8b3666d5f5..46ba7a1a71 100644
--- a/docs/admin_api/media_admin_api.md
+++ b/docs/admin_api/media_admin_api.md
@@ -22,19 +22,81 @@ It returns a JSON body like the following:
 }
 ```
 
-# Quarantine media in a room
+# Quarantine media
 
-This API 'quarantines' all the media in a room.
+Quarantining media means that it is marked as inaccessible by users. It applies
+to any local media, and any locally-cached copies of remote media.
 
-The API is:
+The media file itself (and any thumbnails) is not deleted from the server.
+
+## Quarantining media by ID
+
+This API quarantines a single piece of local or remote media.
+
+Request:
 
 ```
-POST /_synapse/admin/v1/quarantine_media/<room_id>
+POST /_synapse/admin/v1/media/quarantine/<server_name>/<media_id>
 
 {}
 ```
 
-Quarantining media means that it is marked as inaccessible by users. It applies
-to any local media, and any locally-cached copies of remote media.
+Where `server_name` is in the form of `example.org`, and `media_id` is in the
+form of `abcdefg12345...`.
+
+Response:
+
+```
+{}
+```
+
+## Quarantining media in a room
+
+This API quarantines all local and remote media in a room.
+
+Request:
+
+```
+POST /_synapse/admin/v1/room/<room_id>/media/quarantine
+
+{}
+```
+
+Where `room_id` is in the form of `!roomid12345:example.org`.
+
+Response:
+
+```
+{
+  "num_quarantined": 10  # The number of media items successfully quarantined
+}
+```
+
+Note that there is a legacy endpoint, `POST
+/_synapse/admin/v1/quarantine_media/<room_id >`, that operates the same.
+However, it is deprecated and may be removed in a future release.
+
+## Quarantining all media of a user
+
+This API quarantines all *local* media that a *local* user has uploaded. That is to say, if
+you would like to quarantine media uploaded by a user on a remote homeserver, you should
+instead use one of the other APIs.
+
+Request:
+
+```
+POST /_synapse/admin/v1/user/<user_id>/media/quarantine
+
+{}
+```
+
+Where `user_id` is in the form of `@bob:example.org`.
+
+Response:
+
+```
+{
+  "num_quarantined": 10  # The number of media items successfully quarantined
+}
+```
 
-The media file itself (and any thumbnails) is not deleted from the server.