$handle = "4" # The handle of the user to be deleted. Returned when the entry was created. 
$authorizationServiceRef = $wsmanConnectionObject.NewReference("SELECT * FROM AMT_AuthorizationService WHERE Name='Intel(r) AMT Authorization Service'")
$inputObject = $authorizationServiceRef.CreateMethodInput("RemoveUserAclEntry")
$inputObject.SetProperty("Handle", $handle)
$outputObject = $authorizationServiceRef.InvokeMethod($inputObject)
$returnValue = $outputObject.GetProperty("ReturnValue")