Defender ATP Onboarding for VDI - does this apply to Server 2016/19 RDSH Sessions?

Can someone confirm if this would apply to Shared RDSH sessions on Server 2016/2019?
This doc is specifically calling out Windows 10, no mention of the server.

If we look at onboarding Windows Server from the Defender ATP Console > Settings > Onboarding it does seem like the two are separate? The other question is license - is this simply a case that the Server get's onboarded thru the ASC and then needs to be covered that way?

Thanks, Dave C