We want to move gradually from exchange 2010 to 2016. Exchange 2016 is installed and configured. The primary exchange server for now is the 2010 which holds the entire mailboxes. I want to move the mailboxes without the trouble of creating new profile for each user in their outlook. So I'm running tests on test mailboxes but with no success. If it's a new mailbox which I created on the new server the autodiscover works just fine. however, when I migrate a mailbox from the old server to the new one it stops working. when I try to create a new profile in outlook the autodiscover won't work properly, it says it can't contact the exchange server. I need to type in the name of the old server in order to complete the new profile.