I think I know but wanted to verify: A pair of Exchange 2010 servers, two weeks ago I migrated the last of the on-premise accounts to Office365. There are no other active, or used mailboxes on either server. In fact I had all three databases dismounted for the past week.
In order to perform a correct removal, I am thinking that I could just correctly uninstall Exchange from the second server first, then run the uninstaller on the first server and that's it right? I figured that since our entire messaging setup is in Microsoft's hands now *shiver* that as long as Exchange is fully and completely removed then AD will be happy.
Oh wait.. what do I do about MX records in local DNS forward lookup zones?