In this article we will be looking at how to move arbitration mailbox from exchange 2010 to Exchange 2013

The arbitration mailbox is used to store the original message that’s awaiting approval. By default, one arbitration mailbox is created for moderated transport during setup. It’s used for all moderated recipients. You can add additional arbitration mailboxes for load balancing purposes. If you’re using multiple arbitration mailboxes, you need to specify which mailbox to use for each moderated recipient

The main reason being why we are moving the arbitration mailbox is because after post migration it will not allow us to decommission the legacy exchange 2010/2007 server unless we move these system mailboxes to Exchange 2013.

 Run the below command to check the arbitration mailbox name.

Now use EAC to move these system mailboxes to Exchange 2013.

Open EAC – Click on recipients and click on Migration Tab.

Now click on add  and select the option move to a different database

Now click on add and select the system mailboxes of legacy servers to be migrated to Exchange 2013

Now we need to select the target database and click ok.Click on next and finally we are done with moving the arbitration mailbox to Exchange 2013.

Click on next and proceed with the instruction and the arbitration mailbox will be moved successfully.