3 files changed, 7 insertions, 4 deletions
diff --git a/changelog.d/8734.doc b/changelog.d/8734.doc
new file mode 100644
index 0000000000..3bff9021c7
--- /dev/null
+++ b/changelog.d/8734.doc
@@ -0,0 +1 @@
+Clarify the usecase for an msisdn delegate. Contributed by Adrian Wannenmacher.
diff --git a/docs/sample_config.yaml b/docs/sample_config.yaml
index c0cd009230..e9e77ca94e 100644
--- a/docs/sample_config.yaml
+++ b/docs/sample_config.yaml
@@ -1230,8 +1230,9 @@ account_validity:
# email will be globally disabled.
#
# Additionally, if `msisdn` is not set, registration and password resets via msisdn
-# will be disabled regardless. This is due to Synapse currently not supporting any
-# method of sending SMS messages on its own.
+# will be disabled regardless, and users will not be able to associate an msisdn
+# identifier to their account. This is due to Synapse currently not supporting
+# any method of sending SMS messages on its own.
#
# To enable using an identity server for operations regarding a particular third-party
# identifier type, set the value to the URL of that identity server as shown in the
diff --git a/synapse/config/registration.py b/synapse/config/registration.py
index b0a77a2e43..cc5f75123c 100644
--- a/synapse/config/registration.py
+++ b/synapse/config/registration.py
@@ -347,8 +347,9 @@ class RegistrationConfig(Config):
# email will be globally disabled.
#
# Additionally, if `msisdn` is not set, registration and password resets via msisdn
- # will be disabled regardless. This is due to Synapse currently not supporting any
- # method of sending SMS messages on its own.
+ # will be disabled regardless, and users will not be able to associate an msisdn
+ # identifier to their account. This is due to Synapse currently not supporting
+ # any method of sending SMS messages on its own.
#
# To enable using an identity server for operations regarding a particular third-party
# identifier type, set the value to the URL of that identity server as shown in the
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