My mind is blown at how this issue has persisted for a full year and Microsoft still has yet to respond.
For anyone else whose searches for a solution led them to this thread, leave a comment about how disappointed you are that Microsoft continues to defy all reason and needlessly disrupt a perfectly good workflow by taking away basic features found in every other alternative email client, but still demands we give them money and run our businesses with their buggy, insecure, nonsensical operating system.
Keep this thread going forever so they have to acknowledge their failure.
I truly hope Microsoft collapses in the coming years. It would not make up for the decades of frustration they have caused me, both at work and at home, but it would be a great start.
Imagine thinking removing something as basic as being able to edit columns in an email view pane was a good idea. Fire the person who had it.