In your Exchange 2010/2013 environment, you might start moving mailboxes, however when you try creating a batch and then click the new button, you come across the following error message:

Exchange 2013 - mailbox migration error
Exchange 2013 - Mailbox Migration Error 1

The reason you receiving the error message above is because your arbitration mailboxes are still located on an Exchange 2010 server and needs to be migrated to the Exchange 2013 server, you can do so easily by running the following command:

  • Get-Mailbox -Arbitration | New-MoveRequest -TargetDatabase DB2

After that you can run the following command to view the progress of the mailbox moves:

  • Get-MoveRequest | Get-MoveRequestStatistics

Once all the moves have completed, you can then click the new button again and the mailbox move should go through without a problem.

Hope it helps.

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