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Exchange server 2016: cannot remove mailbox database because of so called MailboxExport requests (but cannot find any MailboxExport requests)

Peter Demeyer 0 Reputation points
2026-02-23T10:57:38.81+00:00

Hi,

I've migrated my Exchange 2016 server to Exchange SE and now want to uninstall it.

My first step: Remove-MailboxDatabase -identity mailstore

but that fails with:

This mailbox database is associated with one or more active MailboxExport requests. To get a list of all MailboxExport requests associated with this database, run Get-MailboxExportRequest |

?{ $_.RequestQueue -eq "<Database ID>" }. To remove a MailboxExport request, run Remove-MailboxExportRequest <Recipient ID\Request Name>

  • CategoryInfo : InvalidOperation: (mailstore:DatabaseIdParameter) [Remove-MailboxDatabase], AssociatedMRSRequestExistsException + FullyQualifiedErrorId : [Server=EXCHANGE,RequestId=6d761a9c-3b08-4a33-acf8-a1cb6335aed6,TimeStamp=20-02-2026 14:56:30] [FailureCategory=Cmdlet-AssociatedMRSRequestExistsException] C4 669378,Microsoft.Exchange.Management.SystemConfigurationTasks.RemoveMailboxDatabase

When I run Get-MailboxExportRequest, then that doesn't return anything.

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

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  2. Andy David - MVP 159.9K Reputation points MVP Volunteer Moderator
    2026-02-23T12:48:53.7166667+00:00

    You may have to go the adsiedit route if you are stuck. Just be sure the database is no longer needed

    https://www.nucleustechnologies.com/blog/fix-mailbox-database-is-associated-with-one-or-more-active-mailbox-export-requests-error/

  3. Peter Demeyer 0 Reputation points
    2026-02-23T11:03:42.02+00:00

    adding the -Force parameter with the Remove-MailboxDatabase, like AI suggested, tells me that Force is not a valid parameter. Restarting the information store, and even the whole server, did not help.

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