I'm in the middle of 2007-2010 migration and I'm doing pretty well, but every e-mail seems to want to route back through my old 2007 exchange server to be delivered. How do I server all dependencies from the old server.
I have all the mailboxes migrated, but can't shut off the old box as the new exchange server won't accept delivery. I get a "client was not authenticated" error.
Thanks in advance.