Improve logging of the mapping from SSO IDs to Matrix IDs. (#8773)

1 files changed, 9 insertions, 3 deletions

diff --git a/synapse/handlers/sso.py b/synapse/handlers/sso.py
index 9cb1866a71..cf7cb7754a 100644
--- a/synapse/handlers/sso.py
+++ b/synapse/handlers/sso.py
@@ -71,19 +71,25 @@ class SsoHandler(BaseHandler):
         Returns:
             The mxid of a previously seen user.
         """
-        # Check if we already have a mapping for this user.
-        logger.info(
+        logger.debug(
             "Looking for existing mapping for user %s:%s",
             auth_provider_id,
             remote_user_id,
         )
+
+        # Check if we already have a mapping for this user.
         previously_registered_user_id = await self.store.get_user_by_external_id(
             auth_provider_id, remote_user_id,
         )
 
         # A match was found, return the user ID.
         if previously_registered_user_id is not None:
-            logger.info("Found existing mapping %s", previously_registered_user_id)
+            logger.info(
+                "Found existing mapping for IdP '%s' and remote_user_id '%s': %s",
+                auth_provider_id,
+                remote_user_id,
+                previously_registered_user_id,
+            )
             return previously_registered_user_id
 
         # No match.