A new customer had a disaster where we wound up reinstalling their SBS 2008 machine into the existing AD domain in migration mode. Things are mostly working but here is the issue:
The old server still shows up everywhere for Exchange. New users created on the new server automatically have their mailboxes set up pointing to the old, dead, server. I have to use move-mailbox to fix it each time I create a new employee.
My question(s) are: How do I set the new server as the default AND remove the other one from AD?
Here's a screenshot from Exchange Manager: SERVER-300 is the dead server.