We recently discovered and issue with a VM hosted on ESX that is an exchange 2010 server. For some reason the VM has become corrupt and anytime we try to back it up, it crashes the entire ESX server. We have narrowed it down to this one VM.
We decided to create a new Exchange 2010 VM on a different ESX host and migrate to the new instance. WE have moved the mailboxes and incoming mail without issue. But now when we turn off the old exchange server connectivity to exchange is lost on some but not all clients and outgoing mail gets hung in the mail queue trying to route to the old exchange server first prevent outbound mail.
Speed for connectivity is also become slow. Any help would be appreciated. I suspect 2 issues: 1) Hub transport is routing to old server and 2) AD/DNS is messed up in telling clients which server to go to for mail.