I have a question and hopefully it's an easy one.
I have completed (almost) the migration from our 2007 Exchange server to 2010. Both servers are currently co-existing.
Mail is still being routed through our 2007 server because the check mark telling it to look at the mx record for mail delivery is checked and I have not changed over the mx record.
I have followed to the best of my knowledge every other step from the Microsoft check list and the finalize documentation. All firewall changes everything else has been done.
Is it just as simple as changing the mx record and everything should work? If I missed something and it doesn't work, can I change the mx record back and review and do what is needed? Is there significant downtime in this?
I have never done this and really want to get this done but I'm scared of taking everyone down, without a back up plan.
Thank you for your help.