Hi @flindeborg ,
I'm just going through motions on Windows devices now and having success triggering the deployment from a central network share such as NETLOGON using the below powershell script
Start-Process -FilePath "\\Windows_SMBShare\LsAgent-windows.exe" -ArgumentList "--server LS_Server_FQDN --port 9524 --mode unattended" -Wait
Edit that to your share and server details and run the .ps1 file as a startup powershell script from a gpo seems to do the trick. That way it can tie in with your regular reboot schedules or ran manually if needed.
Hope that helps for the Windows boxes at least!