Remove mutual_rooms `update_user_directory` check, and add extra documentation (#12038)

Resolves #10339

1 files changed, 6 insertions, 4 deletions

diff --git a/synapse/rest/client/mutual_rooms.py b/synapse/rest/client/mutual_rooms.py
index d3872a76c8..27bfaf0b29 100644
--- a/synapse/rest/client/mutual_rooms.py
+++ b/synapse/rest/client/mutual_rooms.py
@@ -42,17 +42,19 @@ class UserMutualRoomsServlet(RestServlet):
         super().__init__()
         self.auth = hs.get_auth()
         self.store = hs.get_datastores().main
-        self.user_directory_active = hs.config.server.update_user_directory
+        self.user_directory_search_enabled = (
+            hs.config.userdirectory.user_directory_search_enabled
+        )
 
     async def on_GET(
         self, request: SynapseRequest, user_id: str
     ) -> Tuple[int, JsonDict]:
 
-        if not self.user_directory_active:
+        if not self.user_directory_search_enabled:
             raise SynapseError(
                 code=400,
-                msg="The user directory is disabled on this server. Cannot determine shared rooms.",
-                errcode=Codes.FORBIDDEN,
+                msg="User directory searching is disabled. Cannot determine shared rooms.",
+                errcode=Codes.UNKNOWN,
             )
 
         UserID.from_string(user_id)