How can I stop users from accessing mailboxes while I move everyone to the Exchange 2003 server. I want to take a day to just move everyone that is left on the old server to the new one and need to lock everyone out until it is completed. I have about 225 to 230 users left on the old server so I will need a little time. Should I lock everyone out of the new server while I am doing this? I plan on using the wizard to move them over about 20 at a time. Thanks, Byron