Outlook slow or freeze issue

[chicagotech]

Situation: The client had a problem with their second DC and they decided to re-build it. After they rebuilt the second DC with different IP address, some Outlook users report slow and freeze problem. The Barracuda backup has a problem to backup some mailbox.

Troubleshooting: We found those computers have Outlook slow or freeze issue is because those computers are setup statics IP with incorrect second DC IP address as DNS. The Barracuda backup server has the same settings. We fixed them by correcting the DNS IP address.