$timeSynchronizationServiceRef = $wsmanConnectionObject.NewReference("SELECT * FROM AMT_TimeSynchronizationService WHERE Name='Intel(r) AMT Time Synchronization Service'") 
$ta0 = GetTimeSync
if($ta0 -ne $null)
{
    $dateTime = [System.DateTime]"1/1/1970"
    $tm1 = [System.DateTime]::UtcNow
    $tm1 = New-TimeSpan -Start $dateTime -End $tm1  
    $tm1 = [System.Math]::Floor($tm1.TotalSeconds)
    $tm2 = [System.DateTime]::UtcNow 
    $tm2 = New-TimeSpan -Start $dateTime -End $tm2  
    $tm2 = [System.Math]::Floor($tm2.TotalSeconds)
    $inputObject = $timeSynchronizationServiceRef.CreateMethodInput("SetHighAccuracyTimeSynch")
	$inputObject.SetProperty("Ta0", $ta0.ToString())  
	$inputObject.SetProperty("Tm1", $tm1.ToString())  
	$inputObject.SetProperty("Tm2", $tm2.ToString())               
    $outputObject = $timeSynchronizationServiceRef.InvokeMethod($inputObject)
    $returnValue = $outputObject.GetProperty("ReturnValue")
}