We currently have a POP/IMAP email (Not attached to AD). I am thinking about switching to Exchange online.
My thought was to move 2-3 users now and test it, and slowly move the rest of my 70 users. It is my understanding I can use my domain in both systems for a little bit while I move all mailboxes.
What would be the best way to go about implementing this, and what are your tips/suggestions on the move?