per the title, I was hoping someone could verify the following DNS entries for my exchange 2003 - 2010 coexistence period. While also posting any others I may need.
a record - mail.domain.com = IP of CAS array (right now it is just the IP of one of my two exchange servers hosting CAS, HT, and MBX roles since I don't have a load balancer yet and will be setting up a DAG soon)
a record - autodiscover.domain.com = CAS array IP again
a record - legacy.domain.com = IP of exchange 2003
now, the records above were taken from technet forums. However, shouldn't my entries be .local since that is how we are set up? We don't use .com internally.
a record - mail.domain.com = change from 2003 IP to 2010 IP?
a record - autodiscover.domain.com = 2010 public IP
a record - legacy.domain.com = 2003 public IP
what do I do with my MX record (mail.domain.com) at this point? It currently points to the 2003 server. Do I change it to the 2010 server's public IP?
Will users be disconnected from their mailboxes and not get mail on mobile devices during and after applying these changes?
Please inform me if I am missing something. I have already configured the routing groups between 2003 and 2010 and mail flows fine. I moved one test account from 2003 to 2010 and am able to send and receive emails both internally and externally as well as being able to login to OWA internally.
Thanks a lot.