Index: SoObjects/SOGo/SOGoGCSFolder.m
--- SoObjects/SOGo/SOGoGCSFolder.m.orig
+++ SoObjects/SOGo/SOGoGCSFolder.m
@@ -976,9 +976,9 @@ static NSArray *childRecordFields = nil;
     {
       sogoUser = [SOGoUser userWithLogin: theIdentifier roles: nil];
       if (sogoUser)
-        allUsers = [NSArray arrayWithObject: sogoUser];
+        allUsers = [NSMutableArray arrayWithObject: sogoUser];
       else
-	allUsers = [NSArray array];
+	allUsers = [NSMutableArray array];
     }
 
   rc = NO;
