$generalSettingsRef = $wsmanConnectionObject.NewReference("SELECT * FROM  AMT_GeneralSettings WHERE InstanceID='Intel(r) AMT: General Settings'")
$generalSettingsInstance = $generalSettingsRef.Get()
$ddnsPeriodicUpdateInterval = $generalSettingsInstance.GetProperty("DDNSPeriodicUpdateInterval") 
$ddnsTTL = $generalSettingsInstance.GetProperty("DDNSTTL") 
$ddnsUpdateEnabled = $generalSettingsInstance.GetProperty("DDNSUpdateEnabled")