Hey, I found these:
- mstsc/v:<server>[:<port>] Specifies the remote computer and, optionally, the port number to which you want to connect.
- mstsc/admin Connects you to a session for administering the server.
- publish .rdp files for users requiring access to a specific server.
https://video2.skills-academy.com/en-us/windows-server/administration/windows-commands/mstsc
BY using /admin means you are bypassing RDS CALs, and only two admin sessions are permitted
However I also found this post:
https://community.spiceworks.com/topic/1963886-deploying-mstsc-client-to-session-host-server
Hope this helps!
Cheers