PowerShell: Activate Remote Windows

$remoteWindows="SHERVER01","SHERVER02"
$licenseKey="XXXXX-XXXXX-XXXXX-XXXXX-XXXXX"

function activateWindows{
    param(
    [string]$key 
        )
    $licensingService = get-wmiObject -query "select * from SoftwareLicensingService" -computername $env:computername;
    $licensingService.InstallProductKey($key);
    sleep 20;
    $licensingService.RefreshLicenseStatus();
    Get-CimInstance -ClassName SoftwareLicensingProduct|where {$_.PartialProductKey}|select Description, LicenseStatus
}

Invoke-Command -computer $remoteWindows -ScriptBlock{
                            param($importedFunc,$importedKey)
                            [ScriptBlock]::Create($importedFunc).Invoke($importedKey);                                
                        } -Args ${function:activateWindows},$licenseKey

#Validate licensing status
Get-CimInstance -computername $remoteWindows -ClassName SoftwareLicensingProduct|where {$_.PartialProductKey}|select Description, LicenseStatus

<# Sample Output
Description                                     LicenseStatus
-----------                                     -------------
Windows(R) Operating System, VOLUME_MAK channel             1
Windows(R) Operating System, VOLUME_MAK channel             1
Windows(R) Operating System, VOLUME_MAK channel             1
Windows(R) Operating System, VOLUME_MAK channel             1
Windows(R) Operating System, VOLUME_MAK channel             1
Windows(R) Operating System, VOLUME_MAK channel             1
Windows(R) Operating System, VOLUME_MAK channel             1
Windows(R) Operating System, VOLUME_MAK channel             1
#>