Exchange Mailboxes migration shows completed but no mailbox was migrated

Exchange Mailboxes migration shows completed

Check if you already have a different move request or batch that contains that user.

Powershell:

Get-MoveRequest

If there any old move requests Please remove on the Exchange server and then start again.

To do this:

From Exchange Management Shell, do the following command:

Get-MigrationUser | Remove-MigrationUser -force