I have a need to change the internal domain name to something else. It was built off a very long unrelated name to the business and since I am doing a upgrade to the AD I thought I would address this... Yes I believe it would be much easier to keep the original name but I have too much time on my hands plus I'm curious on how to do something like this.
My current environment;
Windows Server 2003 R2 - DC1 & DC2 (as a backup) Named "OldName.local"
Windows Exchange 2003 on DC1
My upcoming environment;
Windows Server 2008 R2 - DC1 & DC2 "Named "NewName.local"
So Far I have successfully built the "NewName.local" domain name environment with its own DNS and DHCP & successfully created a Trust between these domains. I can see from both DC's each own AD groups and user accounts. My PC's recognize both DC's with related user accounts however I'm not sure how to allow my "OldName.local" exchange server's mailboxes access to my "NewName.local" domain and I'm curious to see if anyone has a solution on how to move my existing exchange server 2003 (I will eventually upgrade to Exchange 2010 but not now) to the new Domain so that the user accounts on the new Domain will receive and send on their "NewName.local\user" logins?