One of my clients had a problem after Skype for Business Cumulative Update was installed. The Skype for Business Master Replication Agent would start and stay up for about a minute or so. After that, the service would stop with multiple errors in Application Log:
Event ID 1000: Application Error
Event ID 1026: .NET Runtime
At the same time, there is an error in the Lync Server log:
Event ID 2007: LS Master Replicator Agent Service
Replication stopped at the time when I stopped all Skype for Business services as required by the Cumulative Update installation.
It stays like this forever. No replication, time does not change.
I spent hours troubleshooting. I tried many different fixes, but nothing worked.
After a long struggle, I remembered that I had read somewhere that I can uninstall and reinstall each component separately, so I started thinking, why not… and I decided to give it a try.
In Microsoft Control Panel under Uninstall Program section, I uninstalled Skype for Business Server 2015, Core Management Server.
After that, all I had to do is to run the Step 2 in the Skype for Business Deployment Wizard. When I started the Skype for Business Master Replication Agent, everything replicated and worked without any issues.