$publicKeyManagementServiceRef = $wsmanConnectionObject.NewReference("SELECT * FROM AMT_PublicKeyManagementService WHERE Name='Intel(r) AMT Public Key Management Service'") 
$inputObject = $publicKeyManagementServiceRef.CreateMethodInput("ResetCRLList")
$outputObject = $publicKeyManagementServiceRef.InvokeMethod($inputObject)
$returnValue = $outputObject.GetProperty("ReturnValue")