01. Open Server Manager and Click Add Roles and Features. Click Next.
02. Tick Remote Desktop Service Installation. Click Next.
03. Select Deployment Type Quick Start. Click Next
04. Select Session-based desktop deployment
05. Select Server and Click Next.
06. Tick on Restart the destination server automatically if required and Click Deploy.
This will install following roles,
RD Connection Broker
RD Web Access
RD Session Host
07. View Progress
RDS server can be accessible using domain user accounts once the installation is completed. I hope this is useful.