Hi All,
We are currently running Exchange 2013 (Enterprise) CU5. Over the weekend, we attempted to upgrade our MBX & CAS servers from CU5 straight to CU12 (latest), but ran into quite a few issues during the prep stage.
Note: We were able to run /prepareScheme & /prepareDomain successfully, but /prepareAD kept failing for various reasons. The last one being a "split.permissions" error of some sort that we could not resolve.
After hours of failed attempts, we decided to revert back any changes and go back to the drawing board.
So I was wondering if upgrading from CU5 to CU12 was even possible? If not, do I need to go up 1x CU at a time, or is there another CU we need to go tobefore CU12?
Any information on this is greatly appreciated.
Thanks in advanced.
**Also wanted to mention that both servers have .NET v4.6.1 installed (due to previous Windows update). However, I have read that this can cause some issues with Exchange and that it should stay on v4.5. How can this be reverted? It is not appearing in 'Programs and Features'.