Remove-MailUser

1st Microsoft Example

Remove-MailUser -Identity <MailUserIdParameter> [-Confirm [<SwitchParameter>]] 
[-DomainController <Fqdn>] 
[-IgnoreDefaultScope <SwitchParameter>] 
[-IgnoreLegalHold <SwitchParameter>] 
[-KeepWindowsLiveID <SwitchParameter>] 
[-WhatIf [<SwitchParameter>]] 
[<CommonParameters>]