1 files changed, 5 insertions, 0 deletions
diff --git a/docs/sample_config.yaml b/docs/sample_config.yaml
index 394eb9a3ff..3439aa3594 100644
--- a/docs/sample_config.yaml
+++ b/docs/sample_config.yaml
@@ -1182,6 +1182,11 @@ account_validity:
 # Mandate that users are only allowed to associate certain formats of
 # 3PIDs with accounts on this server.
 #
+# Use an Identity Server to establish which 3PIDs are allowed to register?
+# Overrides allowed_local_3pids below.
+#
+#check_is_for_allowed_local_3pids: matrix.org
+#
 #allowed_local_3pids:
 #  - medium: email
 #    pattern: '.*@matrix\.org'