We have exchange 2007 and we bought a new domain name and we're still keeping the old one so that we can wean everyone off of the old emails.

Now, I'm wondering how to go about this. I need to add the new domain as accepted and authoritative by the exchange server. Emails on the new domain need to get routed to the inbox and ditto the old emails, however, I want to be able to change the reply-to in the header to the new email address automatically. I also want to set the new email addresses as the defaults.

Ideally, I'd like to be able to add a message at the bottom of every externally outgoing email saying that the new email is [email protected]. But this is a nice to have, certainly not a must have.

I've added the new domain as authoritative, and managed to change the primary smtp email addresses to the new one, but sent emails are not being routed to them and neither are the old email addresses!

Now how the heck would I go about fixing all of that? I'm completely stumped!

TIA