My Exchange server is not switching to my second domain controller when my first one goes down or is rebooted. Everyone receives an Exchange server not available message. The primary DNS server for the Exchange server is my first DC. I think that for some reason Exchange isn't flipping to it's 2nd DNS server (the 2nd DC) and continues to fail on the first one. Anyone have any ideas on why this would happen or how to fix it? Thanks, Dave
