I would like to keep the Read/ Unread Status while I open/ double-click the e-mail on outlook. Unfortunately, It seems that there is not exist any default setting/ option to define the function. For the current status, when I double-click the unread mail, It would change the unread status to read status. Is there any approach/ method that could modify this setting? Many thanks for any feedback in advance.
Remark: I have googled a few pieces of information, but it focuses on changing the setting for appearing in the viewing pane and moving to another message. It is out of scope for my problem.