Hi,
 I am looking for dos command(s) that return me all the possible information of Remote desktop like its usage, version, license ETC.
Can you please help me?Please explain more clearly what you are asking about. Do you mean information about the remote desktop client version on the same machine? Or a remote machine? Also, you will get much spam if that is your real email address.

Too LATE now... Hi,
Sorry for late response. I was midnight in my timezone.
Yes,I am looking for information about remote desktop client version on the same machine.
Thankyou again. Its my understanding that RDP version is based on WHICHEVER OS version your running... I am not aware of any "updates" to RDP.

XP, Vista, 7, 8, *8.1(?), 10 etc. * Unsure if 8.1 is a different version of RDP than 8.

So knowing what OS version will tell what RDP version.

As far as usage. i am not aware of any LOGGING feature associated with RDP to show use statistics... However one could make an app that works as a launcher/logger for RDP service. So service is off and RDP service is turned on and logged and then turned off when session complete maybe. By use of a NET START TermService instruction locally or a SC \\servername start TermService  remotely.

https://www.windows-commandline.com/start-terminal-services-command-line/