Hi,
If you would like all users to remote connect to the RDS Server, you will need to purchase RDS CALs. And per-user cal should be more compatible for you.
For license purchasing, please contact Volume Licensing Service Center for consulting.
For RDS deployment, you could refer to below blogs which have step-by-step instructions.
Deploying Remote Desktop Services 2016 Step-By-Step
https://nedimmehic.org/2017/01/21/deploying-remote-desktop-services-2016-step-by-step/
Thanks,
Eleven
----------
If the Answer is helpful, please click "Accept Answer" and upvote it.