как узнать версию rdp клиента windows (он же mstsc.exe)
Первый, самый простой. Берем наш ярлык с rdp, кликаем правой кнопкой мышки(вызываем контекстное меню) и выбираем пункт «изменить».

Теперь кликаем по в верхний левый угол открывшегося окна(там где маленький мониторчик) и выбираем “о программе”

Появиться информационное окно

Второй вариант:
Ищем файл mstsc.exe, по умолчанию он лежит в папке C:\Windows\System32.
кликаем правой кнопкой мышки(вызываем контекстное меню) и выбираем пункт свойства

переходим во вкладку “Подробно” и видим нужную нам информацию.
Determine Remote Desktop Protocol version programmatically?
Remote Desktop Protocol version 6.1 changed the way RDP sessions are handled (making session 0, which previously meant «console session», into a non-interactive session). I need to be able to figure out from within my program how to determine just what version of the RD protocol is being used on the current RDP session. Nothing I can find in the Windows Terminal Services API, however, seems to give me the protocol version.
RDP Version Number?
Does any know how to get the RDP version Windows is running with?
5 Answers 5
Or you could Right click on the window and select About 
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Windows RDP uses the executable mstsc.exe located in c:\windows\system32
Simply right click on this file, and go to properties, then click the version tab.
hope this helps.
or you could also click Start > Run > mstsc and when you see the Remote Desktop Connection window appear, click the top left hand corner «computer» icon and select «About».
Here’s a PowerShell query you can use:
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There can be maybe better way with PowerShell.
First one need complete table of MSTSC build numbers and just compare to output of:
And the second one is to read CLSID of registered components which contain also RDP binaries, like that:
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