It is sometimes necessary to move existing mailboxes from one messaging server system to a another messaging server system. This commonly occurs in the following circumstances:
Migrating from a non-Sun Messaging Server to the Sun Java System Messaging Server
Moving mailboxes from one physical server to a different physical server
Messaging Server provides several ways to move mailboxes from one system to another. Each method has its advantages and disadvantages. These methods are described in Migrating User Mailboxes.