Using Classic Outlook on Windows for personal email, calendar, and contact management
Actually, for me this part works. When the little ballon pops up and I am quick enough I can click it and the email opens, fair enough. However, if I am not quick to react or I am not even sitting by the computer and then the notification is moved to the "Action center" if I click them there they are just removed from the sidebar but otherwise nothing happens.
But I hear that people have problems with clicking the little pop-up balloon too, so this problem has several layers depending on which version and patch level of the softwares you use, but - apparently - no solid solution.