If you run a test on a remote computer to which you have connected via Remote Desktop and you minimize the Remote Desktop window, the operating system switches the remote session to the GUI-less mode. As a result, the test engine will not be able to interact with the tested application GUI and your test will fail.
To work around this issue, on your local computer (the one from which your launch Remote Desktop), change the registry settings that affect the way Remote Desktop treats the GUI of the remote session when being minimized.
Change your local computer registry settings
On your local computer, close all open Remote Desktop sessions.
Launch the Registry editor (regedit.exe).
Navigate to one of the following Registry keys, depending on whether you wish to modify the Remote Desktop settings only for the current user or for all users on the computer:
HKEY_CURRENT_USER\Software\Microsoft\Terminal Server Client
HKEY_LOCAL_MACHINE\Software\Microsoft\Terminal Server Client
Note: There are security settings and group policies that override the HKEY_LOCAL_MACHINE keys with the HKEY_CURRENT_USER keys. In this case, modify the Remote Desktop settings in the HKEY_CURRENT_USER registry key.
Create a DWORD value named RemoteDesktop_SuppressWhenMinimized and set it to 2:
On the 64-bit version of Windows, you may have to repeat the previous step for one of the following keys. Similarly, which key to choose depends on whether you want to edit the settings only for the current user or for all users:
HKEY_CURRENT_USER\Software\Wow6432\Microsoft\Terminal Server Client
HKEY_LOCAL_MACHINE\Software\Wow6432\Microsoft\Terminal Server Client
Close the Registry Editor.
Now when you minimize the Remote Desktop Connection window on your computer, this will not affect the remote computer’s GUI and the GUI will be available to your automated tests.
Creating the RemoteDesktop_SuppressWhenMinimized Registry value causes issues with Microsoft Lync. For instance, Lync may fail to share screens.