Our Sharepoint 2013 farm isn't running the user profile synchronization. We realized a few days ago it hasn't run since August (over 2 months). The User profile service starts and runs. But the synchronization service when started in Central Admin gives and Unexepected Error immediately after starting.
The FIM service starts and runs fine but the FIM Sync Service is disabled. When we set it to automatic (delayed start) the sync service in central admin still doesn't start with the same error. The hourly sync timer job then sets the FIM sync service back to disabled.
The enexpected error we get looks like below:
Sorry, something went wrong
Correlation ID: 05319c9e-771d-50be-9c35-d4ad48eb3f41
Date and Time: 10/26/2018 10:59:49 AM
When checking the ULS logs i can't find that correlation ID however I can see in the Event viewer the error below;
The Execute method of job definition Microsoft.Office.Server.UserProfiles.UserProfileImportJob (ID 6cce2826-b9b8-454c-82d1-88283e18f83c) threw an exception. More information is included below.
Operation is not valid due to the current state of the object.
This error keeps getting triggered every minute due to the incremental timer job for user profile sync. I have disabled that but the User Profile Sync service still fails to start with the unexpected error.
Any ideas on what could be causing this issue?
Thanks in advance!