[Windows 10] Retrieve non-resizable window that is off-screen

Problem

 At times, when working on different screens, e.g. with a laptop, it happens that one moves non-resizable windows to a position on a screen that "does not exist" on the next working place. It happened to me with the notification window of Outlook. One cannot grab it at the handlebar, obviously. One cannot either grab it with the move command of the context menu of the respective task bar icon. One cannot maximize it to make it visible on the associated screen.

Solution

 However, I just learnt that after selecting the move command and without any other action inbetween, one can press an arrow key and the window gets snapped to the move cursor so one can reposition the window now.