IOT Link - Windows Management using MQTT

I use this to very handy application to start my PC in ‘gaming mode’. Ideally I would be able to run a .exe file (some keystrokes compiled with autoit) on the windows logon screen to switch users, but that doesn’t seem to work.

Is IOT link able to run .exe files on the logon screen and am I doing something wrong, or is it a limitation of IOT link or Windows?