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Stalled due DiskLatency/UnknownReason/ - Resolved

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Issue:

When migrating a number of mailboxes to the Exchange Online some mailboxes may show the message "stalled due to disk latency".

Solution:

  1. Check the status of the migration:
Get-MoveRequest  | Get-MoveRequestStatistics | Select *TimeStamp, DisplayName, StatusDetail, TotalMailboxSize, TotalArchiveSize, PercentComplete 

      2. Force the mailbox that is already synced to complete:

$T = Get-Date

Get-MoveRequest -Identity muatazwad@easytechsteps.com | Set-MoveRequest -SuspendWhenReadyToComplete:$false -preventCompletion:$false -CompleteAfter $T
Get-MoveRequest -Identity muatazwad@easytechsteps.com  | Resume-MoveRequest

      3. Suspend the mailbox that is stalled:

Suspend-MoveRequest -Identity "Mailbox"

       4. Resume the mailbox after 10 minutes:

Resume-MoveRequest -Identity "Mailbox"