The RH 2020 software specifications mention Windows 7 or 10 as the OS. However, I tried installing RH 2020 on Windows 2016 server and it installed and is working perfectly. Does that mean Windows 2016 server is supported?
Nope, and that may be a license violation too - it's only supposed to be installed on a workstation.
Nope, it means you'll likely find something breaks later. Definitely not supported.
See www.grainge.org for free Authoring and RoboHelp Information
Just to add on top of (and confirm) what has already been commented: Yes, it a) would be a violation of the license agreement and b) is not supported.
Please contact firstname.lastname@example.org to discuss your specific needs for your scenario and I'm sure we can find a solution 🙂