I encountered an issue where both Forefront Identity Manager and Office 365 DirSync both failed to start.
My investigation of this after I received an email from @MicrosoftOnline.com which had informed me that Windows Azure Active Directory did not register a synchronization attempt from the Directory Sync tool.
I attempted to do was start the Microsoft Online Services Directory Synchronization Service. This had failed because depends on Forefront Identity Manager Synchronization Service which was also no longer starting.
I attempted to start the Forefront Identity Manager Synchronization Service this failed with the following message:
Verify that the service account has permissions to the following registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Forefront Identity Manager\2010\Synchronization Service
If the problem persists, run setup and restore the encryption keys from backup.
After my verification I attempted I uninstalled the Office 365 DirSync along with Forefront Identity Manager and SQL which were all installed. This time around I unable to even install the Office 365 DirSync
All three of my attempts had failed.
So what changed?
I rebooted the system; and after it had resumed the services which worked seemed to no longer function.
Then it *clicked* after much investigation and review. The question I did not ask. Could Office 365 exist on the same system that’s also running ADFS. I soon found out the answer is ” *NO* “.
The Directory Synchronization tool cannot be installed on Active Directory Federation Service.
So I uninstalled the Office 365 DirSync, along with SQL. Followed by the removal of the ADFS Role from the server.
After the restart I installed the Office 365 DirSync again and configured it as I have done before and all is working once again.
And now I and you all know
I hope this post help you and saves you some time. I spent a day working on this and waiting for Microsoft to call me. I seems like I have resolved this issue on my own; once again.
If your using Office 365 DirSync do NOT enable the ADFS Role if you do, you run the sure chance of breaking your working Office 365 DirSync.
Environment: Windows Server 2012 R2 Update 1 (x64)