I am going to be moving mailboxes from an Exchange 2000 server to an Exchange 2003 server. I am running a Windows 2000 AD environment. Does anyone know how I can prevent users from accessing their mailboxes during the move? I suppose I have the option of disabling the accounts as I move them, but I am searching for a way that will allow the users to continue to be able to access the network and their files. We also entertained disabling the netlogon service on the Exchange 2000 box, but I am not sure if any of the processes/services will need that service running to correctly run the "Move mailbox wizard." Also, it should be noted that the original Exchange 2000 server is a domain controller (1 of 2, and not the GC), and the new Exchange 2003 server is not.