I’ve inherited a setup where Exchange 2010 is installed on Windows Server 2008 R2, I want to upgrade to Exchange 2016 and Windows Server 2016. I’ve read Microsoft does not support upgrading OS when Exchange is installed. A further issue is that this server is also our main domain controller.
I believe the best scenario is to create a new Windows Server 2016 machine, install Exchange 2016 and migrate mailboxes across.
After that I’d decommission the Exchange 2010 part of the Windows Server 2008 machine and add the new 2016 server to the existing domain controller.
Is this the best approach, has anyone done something similar and what potential issues do you see from this approach?