When Connecting to an IMAP Source How does the service connect to each mailbox?
On the Mailboxes page of the Migration Plan wizard, a tab delimited mailbox file is uploaded containing mailbox information. The password for each mailbox must be provided in this file. The mailbox file will will contain columns for source mailbox, source password, and target mailbox. On this page clicking the link "How to format a mailbox file" will display further information on how to format the upload file and provide a link to download an example file.