Using Classic Outlook on Windows for personal email, calendar, and contact management
As many others have stated, this is a deal killer for me. A large part of my daily tasks revolve around managing message queues, organized with rules. Being able to see the # of messages in each of my "Favorite" folders, at a glance, is crucial.
Microsoft - add this capability back in please! As long as I have the option to use "old" Outlook at my company, I will continue to do so.