The user's mailbox has already been migrated.

By: Ashley Printer Friendly Format    

If you are getting this eror while migrating your mailbox to office 365 or Live Edu in the cloud then one of the following could solve your issue.

If you run a new migration batch, in the CSV file, remove the rows for mailboxes that have already been migrated.





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Outlook Live couldn't sign in to the user account on the IMAP messaging system.

An Outlook Live mailbox wasn't found for the user.

The user's mailbox has already been migrated.

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