Migrate exchange online error message

soul 6 Reputation points

I transferred my mailbox to exchange online and the following message appeared.
How to solve it?


The request has been paused temporarily because a database has failed over. The Microsoft Exchange Mailbox Replication service will attempt to continue processing the request when capacity becomes available on the new server hosting the database.

Microsoft Exchange Online Management
Microsoft Exchange Online Management
Microsoft Exchange Online: A Microsoft email and calendaring hosted service.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Amit Singh 4,861 Reputation points

    As per my experience, a similar issue could occur if the firewall blocks the requests sent from the O365. Temporarily close the firewall for test purposes. If that is the issue, check if any incorrect settings make it happen.
    Besides, this error can also be related to slow migration performance.
    Possible solutions are as follows:

    1. Check the local move request for the migrated users on the on-premises Exchange Server.
      Get-moverequest -identity <emailaddress> | Get-MoveRequestStatistics | Export-Clixml c:\export.xml
      You can open that XML file in IE or specialized readers.
    2. Try to see if setting the TCP KeepAliveTime on the server hosting the source mailbox to 5 minutes (instead of 2 hours) will fix the issue. This can be done in the registry of the source mailbox server but requires a reboot to take effect.

    I hope it helps.

    Helpful links

    Remote Move Migration Error: MigrationTransientException
    Exchange Migration Error: MigrationTransientException MapiExceptionMdbOffline

    1 person found this answer helpful.
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  2. Andy David - MVP 143.8K Reputation points MVP

    Try restarting the "Microsoft Exchange Replication service "

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  3. Xzsssss 8,861 Reputation points Microsoft Vendor

    Hi @soul ,

    So the migration is now moving on or has been stopped?

    I think you should check the Exchange related services, and how you did the migration?
    You may follow the steps of this document: https://learn.microsoft.com/en-us/exchange/hybrid-deployment/move-mailboxes

    Best regards,

    If the response is helpful, please click "Accept Answer" and upvote it.
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  4. Ernest Stahnke 1 Reputation point

    I have the same issue moving by imap from normal mail hosting to Exchange Online.
    Created ticket in MS Support but still no help.

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