Exchange 2013: Outlook is disconnected when the database points to another server in a DAG.

The above issue can be solved by selecting IIS in “Exchange Back End”, the port 444 is assigned the certificate “Microsoft Exchange”.

Need to install the certificate Microsoft Exchange in “Trusted Root Certification Authorities” and perform the iisreset.

Then run the Test-ServiceHealth cmdlet from ExchangePowerShell to check that services are running correctly and server components are in the correct state.