Microsoft Transporter implements the Web services in Microsoft Exchange Server 2007 to migrate information from Lotus Domino mail databases to mailboxes. To perform this task, you must use Exchange impersonation, which allows you to impersonate, or temporarily be authenticated as, the mailbox owner during the mail migration process. Mail migration does not work unless Exchange impersonation is enabled on the server.
Use the following Windows PowerShell command to enable impersonation:
(get-exchangeserver).DistinguishedName -User (Get-User -Identity
User1 | select-object).identity -extendedRight