The Move-IMAPMailboxToExchange cmdlet will extract content from IMAP mailboxs and copies that content into existing Exchange ...

The Move-IMAPMailboxToExchange cmdlet will extract content from IMAP mailboxs and copies that content into existing Exchange mailboxes.  The cmdlet binds to the source IMAP mailboxes using mailbox information passed through the command parameters or through a 'Transporter Object' created with Get-IMAPMailbox.  To copy content into Exchange with the Move-IMAPMailboxToExchange cmdlet you will must have Recipient Admin permissions on the Microsoft Exchange Server 2007 or full mailbox access to the mailboxes being migrated.  To extract mailbox data from an IMAP server you need either individual LoginID/Passwords for each mailbox or an Administrator LoginID/Password that can be used to access each mailbox.