User Profile Sync will not sync any users

Question

I click on Start Profile Synchronization (Full or Incremental) and nothing happens. It never shows it going through the different sync stages.

1. Running with farm account that has full rights
2. SharePoint 2010 with SP1 and October 2011 CU installed and upgraded successfully
3. No errors given in the logs, just a log that it started, then nothing
4. running FIM Sync Service manager shows it starting, in-progress and finishing within about 30 seconds. The Sync Stats are all 0s except for Unchanged: 1.
5. In FIM, Step Type is: Full Import (Stage Only)
6. I've recreated the service application, restarted the service, restarted the servers many times.
7. Synchronization Connections are properly configured with AD. The proper OUs are selected.

How can I figure this out? It seemed to be fine before the installation of October 2011 CU. Is that the cause of it?

Answer 1

You did not mention if this is a multi server farm. I have seen this behavior when you have the service running on more than one server. In Central Administration go to Services on Server and ensure that the User Profile Sync Service is only running on one server. Once you stop it on all servers, provision it on just one server in the farm.

LMK if this helps.

Matt

Answer 2

I was just fighting with this this morning. I had everything setup just like you do. I finally had to explicitly give "Allow login locally" rights to my service account and that solved the issue.

Answer 3

Granting the Replicate Directory Changes AD permission to the SP_Farm account (timer service account) fixed this issue for me. Follow the instructions in this KB article:

https://technet.microsoft.com/en-us/library/Hh296982.aspx