Using Classic Outlook on Windows for personal email, calendar, and contact management
The problem is that Microsoft's Outlook dev team implemented 'Fullscreen' mode rather than 'Maximise' the window. 'Fullscreen' was designed by Microsoft for game developers, where Gamers don't want the taskbar popping up and interrupting their gameplay. It's use in Outlook is a great example of how it should NOT be used. This is such an easy fix for a usability problem that affects every User.