1 files changed, 9 insertions, 0 deletions
diff --git a/synapse/config/user_directory.py b/synapse/config/user_directory.py
index 142754a7dc..56eff15ef8 100644
--- a/synapse/config/user_directory.py
+++ b/synapse/config/user_directory.py
@@ -24,6 +24,7 @@ class UserDirectoryConfig(Config):
     def read_config(self, config):
         self.user_directory_search_enabled = True
         self.user_directory_search_all_users = False
+        self.user_directory_defer_to_id_server = None
         user_directory_config = config.get("user_directory", None)
         if user_directory_config:
             self.user_directory_search_enabled = (
@@ -32,6 +33,9 @@ class UserDirectoryConfig(Config):
             self.user_directory_search_all_users = (
                 user_directory_config.get("search_all_users", False)
             )
+            self.user_directory_defer_to_id_server = (
+                user_directory_config.get("defer_to_id_server", None)
+            )
 
     def default_config(self, config_dir_path, server_name, **kwargs):
         return """
@@ -50,4 +54,9 @@ class UserDirectoryConfig(Config):
         #user_directory:
         #  enabled: true
         #  search_all_users: false
+        #
+        #  # If this is set, user search will be delegated to this ID server instead
+        #  # of synapse performing the search itself.
+        #  # This is an experimental API.
+        #  defer_to_id_server: https://id.example.com
         """