ok, the upgrade can't be done with WDS, what can be done is a new installation on the same disk. This will leave a Windows.Old folder on your system drive, and all the previous configuration will be lost.
Mike, you were right: It is necessary to use Microsoft MDT for the upgrade to Windows 10.
https://technet.microsoft.com/en-us/itpro/windows/deploy/upgrade-to-windows-10-with-system-center-configuraton-manager