macdiesel1
Technical User
We recently migrated from Exchange 2007 to 2013. Everything was going good until we demoted an old domain controller. There is still a primary DC at this site. We keep getting topology errors on the Server 2012 Exchange server about not being able to contact DC. This happens about twice a day. A reboot of the server temporarily resolves it. Any thoughts? I have removed the name server DNS records referencing the old DC. That server is still in use, but no longer as a DC. We are on CU3 version of Exchange. Thanks for any help!