Using New Outlook on Windows for professional communication and productivity
This doesn't work if you double click on the message to open it. It only works for single click. If you double click a message in your inbox, it will open in a new window and no matter what settings you have set, it will not mark it read. If you single click the message, it will open in the "reading pane" and it will get marked read based on your settings mentioned above. This to me is not the desired behavior anyone would want. If I double click a message it should be able to get marked read.