Remote Desktop Services (RDS) is one of the roles under server roles provided by Microsoft Windows Server. What makes RDS different from a usual remote desktop connection is the the number of concurrent connections to the remote host. By default Windows enables only two concurrent session for a user to access a remote server using RDP. If you require many users to connect to a remote server (aka Remote Desktop Session Host (RDSH) ), you will to procure client access license (CAL) to achieve the same. We'll see how to provision this setup and their requirements.