|Knowledge Base - Why will it take so long to move my old email to the new system?|
|by Brad Weaver|
The main factor is there is a lot of data to move, and that takes time. This is a complex migration, which requires that we first backing up all data, then restore it to the new server, then convert all mailboxes to the new mailbox format. Once the conversion process begins, individual mailboxes will appear as soon as they have been converted, so some people will get their email back on Tuesday, and others on Wednesday.