I have a Windows Server 2016 Standard in a Workgroup and a Windows Server 2019 Standard (which should never need anything other than the allowed Admin users) that is going to be an Active Directory/Domain Controller in the very near future. Due to some unexpected circumstances I have discovered that an application that was just migrated to the 2016 server needs to allow 3-5 RDP based users directly on the server with the application for the foreseable future.
I was never planning on joining the 2016 server to the new domain and was always planning for it to be isolated in a Workgroup, but I am horribly confused over RDP licensing as well as the whole workgroup/active directory business. What happens if I turn on RDP licensing service on the 2016 server? Can even do RDP licensing on the 2016 server without it being in a domain?
I've already read this doc and honestly I'm still super confused: https://docs.microsoft.com/en-us/windows-server/remote/remote-desktop-services/rds-client-access-license
Thanks.