Exchange Mailbox Migration Failed

So chances are after reading my previous post on how to move mailboxes via organizational unit you have migrated a couple hundred mailboxes.

Exchange mailbox migration failed.

The date and time when the migration batch was initiated. Note that this post has some in depth troubleshooting steps so it is not necessarily something that you ll read for fun. Some parameters and settings may be exclusive to one environment or the other. There is a good possibility that a small number of them have the status of failed and that if you dig in to the log of the transfer you will come across the following error.

This cmdlet is available in on premises exchange and in the cloud based service. The problem is when moving mailboxes in a migration batch manually suspending them with get moverequest identity mailbox suspend removerequest causes the eac to think that since the move was suspended outside of the migration it has failed. The following list shows the administrative privileges required to migrate exchange mailbox data using an imap migration. This example displays the number of mailbox items that failed to migrate which are called skipped items and information about each skipped item.

For more information about the finalization process see complete migrationbatch. But the mailbox is massive and it had been moving for hours. The date and time when the migration batch was created. 95 solution you can remove the move request and start it again with both a baditemlimit and acceptlargedataloss flag these might seem scary but i ve migrated many thousands of mailboxes and never seen a problem.

The number of mailboxes in the migration batch that have been finalized. Verify that the move. The number of mailboxes for which the migration isn t successful. This mailbox exceeded the maximum number of corrupted items that were.

Finalization is performed only for migration batches for remote move migrations in an exchange hybrid deployment. The administrator account must be assigned the full access permission for each user mailbox on the exchange server. The mailbox address of the admin who created the migration batch. In this post we will cover related troubleshooting.

In our previous blog post we covered an overview of what migration endpoints are how to find them and what makes them tick. Use the down arrow to select the target delivery domain for the mailboxes that are migrating to office 365 in most hybrid deployments this is the primary smtp domain used for the exchange online organization mailboxes.