When you connect to a computer via Windows Remote Desktop, windows runs the user in a Terminal Services environment. The Sentinel LM dongle is not designed to operate this way.

If microscan is already running, it will continue to operate normally.
If you close and restart microscan while in remote connection, the microscan will start as a terminal services mode and be unable to read the dongle and hence go into the trial licence mode - this will be shown in Setup Tools status bar at the bottom of the screen.