I am currently working on demoting DC1 as a domain controller and leaving just for Exchange server. As a first test I have stopped the ADDS service on DC1 and hoping the exchange to work using the other DCs.
Webmail worked fine but outlook got disconnected and kept on asking for credential. Also active sync stopped working on the mobile devices.
So far Exchange is not pointing to DC1.
Am I missing something here or need to look for more things before I do another test.
What are the other things I should consider.