CmdID / PowerShell / Cmdlets / Remove
Remove-MigrationUser
Use the Remove-MigrationUser cmdlet to remove a migration user from a batch. Exchange PowerShell reference
From the Exchange PowerShell reference 6 parameters Its page in the reference
Parameters
-IdentityThe Identity parameter specifies the user that you want to remove from the migration batch.-Confirm, -cfThe Confirm switch specifies whether to show or hide the confirmation prompt.-DomainControllerThe DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory.-ForceThe Force switch hides warning or confirmation messages.-PartitionThis parameter is reserved for internal Microsoft use.-WhatIf, -wiThe WhatIf switch shows what the command does without making any changes.