$setupAndConfigurationServiceRef = $wsmanConnectionObject.NewReference("SELECT * FROM AMT_SetupAndConfigurationService WHERE Name='Intel(r) AMT Setup and Configuration Service'")
$inputObject = $setupAndConfigurationServiceRef.CreateMethodInput("ExtendProvisioningPeriod")
$inputObject.SetProperty("Duration", "1") # Max value = 24.
$outputObject = $setupAndConfigurationServiceRef.InvokeMethod($inputObject)
$returnValue = $outputObject.GetProperty("ReturnValue")