To start off, I am new to working with email servers so I apologize ahead of time if I ask you to explain further or just ask a dumb question in general. Right now we are running an on premises MDaemon Email server with approximately 160 users with the larger mailboxes approaching 5GB. We haven't completely decided whether or not we want to stay on premises and just switch to exchange, do only Microsoft hosted exchange, or go full 365. Also the current MDaemon server is not integrated into AD in the sense that right now we have two separate users one for email and one for logging into our domain, this is something else we would like to fix.
Would the process be the same for all three options?
I did a little prior research that suggested we go around to each of the machines and export the mailboxes into pst files and then import them into...