I'm running 2x Domain Controlers (3t & 3t00 Win Server 2016 CU10) on the same domain with 2xExchange server (Mailbox Exchange 2016 ) configured with DAG. When both servers are online owa & ecp works fine. If 3t goes offline (which is the first server that i configure with AD and Exchange), then owa & ecp on 3t00 return blank page after log-in and Outlook won't connect.
I tried SSL Certificate change at bindings, also I recreated Certificates and finaly i tried recreation of owa & ecp VirtualDirectory.
I can connect to EMS at 3t00 and Exchange seems to work.
Any help to make 3t00 to work even 3t fails?