There is a known issue when attempting to perform remote shadowing on a windows host with TSplus Remote Access version 12 or below. 


You can use this procedure as a workaround :


- Set the group policy to allow Remote Control without user consent.

- Then you can use the following batch file to shadow or remote control a session: 


set /p session="Enter the Session ID to shadow:"

mstsc.exe /shadow:%session% /control /noConsentPrompt /noConsentPrompt

Different method integrated in TSplus :

Add the following line : sessionsmanager-showconsentprompt=no to the [Security] section of the appcontrol.ini file located in C:\Program Files (x86)\TSplus\UserDesktop\files.