Recently in one of the Exchange Server was frequently giving this alert on the SCOM alerts.

Ran the below command to check the health of the affected Exchange Server

Get-ServerHealth -Server ServerName

Could see the MailboxMigration HealthSet Unhealthy and the other healthsets were healthy.

The SCOM alert too reported the same DUMP directory:

<b>Dump Directory:</b>
C:\Program Files\Microsoft\Exchange Server\V15\Diagnostics\MigrationResponderDumps
at Microsoft.Exchange.Monitoring.ActiveMonitoring.Migration.Probes.MRSQueueScanProbe.DoWork(CancellationToken cancellationToken)
at System.Threading.Tasks.Task.Execute()
— End of stack trace from previous location where exception was thrown —

Also at the end provided the same information for troubleshooting

Note: Data may be stale. To get current data, run: Get-ServerHealth

As a part of normal troubleshoot restarted the Mailbox replication service and the issue still persists.

Now started looking into the event logs and got the below event

It was trying to process jobs in a recovery database which was created by an admin and forgot to remove them after a restore job.

So dismounted this recovery database and removed them which solved this issue and after that this error never reappeared again.

Thanks & Regards

Sathish Veerapandian