My company is relocating and we have an SBS server and host our own Exchange Server. We will be using a new ISP and will get a new IP address at the new office, obv.
I'd like the transition to be as seamless as possible. Ideally, we shut down our Exchange server in our old server room, physically move it to the new rack in the new office's server room, start it up and start receiving email. We don't want any email to bounce and we want to send and receive email as soon as possible.
How? Do I add a new MX record with our new static IP, but with a lower priority? Do I adjust the TTL?
What's the best way?