I had an issue with my Profile Synchronization service.¬† After a server reboot it wouldn’t start again.
What I did to fix it was:

  • Stop the User Profile Service and the User Profile Synchronization Service from the Central Administration Page
  • If it is stuck on starting, you need to use the SharePoint 2010 Management Shell / Powershell to stop it

    Now copy the GUID from the “User Profile Synchronization Service”

    You also need to delete any Setup Jobs still running
  • Go to Central Administration¬†-> Application Management -> Manage Service Applications and delete “User Profile Service Application”
  • Recreated the “User Profile Service Application”
  • Delete all the FIM Certificates in the MMC->Computer->Personal and MMC->Computer->Enterprise certificate stores
  • Perform an IISReset
  • Restart the User Profile Service and the User Profile Synchronization Service, they should now start cleanly
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