I have surface 6 PRO and would like to upgrade Win 10 Home to Pro is this without using any activation tool so that the new Windows Pro will be Genuine.
How would that work? There's no way to generate a Digital License out of hot air . I mean upgrading is easy but it won't give a Digital License.
AFAIK you'll need to have an ei.cfg and/or pid.txt file in the Source folder of the used ISO File. The ei.cfg file needs to point to a Windows 10 Pro Retail version while the pid.txt file should contain a Windows 10 Pro Product Key (Original/Legal/Unused) but a VL Product Key.
To (in place) update my surface to 10 pro, I just bought the cheapest pro key I saw on ebay - it cost around $2, and worked perfectly. Just remember to go to system clean up, and remove the old os! It had backed up 10 home just in case, and that was taking about 30gb