We need to change our email address for all user on Exch 2007 from (this is an example) 12345.com to abcde.com
What steps would be needed to make this change and would there be downtime involved for the users to make the change?
I know that I would have to have the certificate redone but just want to make sure on all of the other steps needed.
I think I would just have to go into Recp config and make he change there on the recpt policy.
So basically create a new accepted domain, then create a new email address policy?
If this is correct, please let me know if I am missing anything.