Lots of reasons for moving, often because you want to delete one of the mailbox databases.
User Mailboxes
new-moverequest "joe bloggs" -TargetDatabase "Mailbox Database" Get-MoveRequest | Get-MoveRequestStatistics
Arbitration Mailboxes
Get-Mailbox -Arbitration | New-MoveRequest -TargetDatabase "Mailbox Database" Get-MoveRequest | Get-MoveRequestStatistics
Remove the completed Move Requests
Get-MoveRequest -MoveStatus Completed | Remove-MoveRequestor if you have lots to do
Get-MoveRequest -MoveStatus Completed | Remove-MoveRequest -Confirm:$false
Additional Moves
You may also have to:
Get-Mailbox –RecipientTypeDetails DiscoveryMailbox | Format-Table Name Get-Mailbox -RecipientTypeDetails DiscoveryMailbox | New-MoveRequest -TargetDatabase @Mailbox Database" Get-MoveRequest | Get-MoveRequestStatistics Get-MoveRequest -MoveStatus Completed | Remove-MoveRequest
To get a list of all Audit mailboxes in this database, run the command
Get-Mailbox -Database <Database ID> -AuditLog
To disable a Audit mailbox so that you can delete the mailbox database, run the command
Get-Mailbox -Database "Mailbox Database 2138967441" -Auditlog | Disable-Mailbox
Once all moved, old DB can be removed. If you have created a new mailbox database, you will need to add new AV exclusions asper MS’s recommendations.