re&nbsp;:I configured mail to be marked read immediately upon display When you are reading the secon

re :I configured mail to be marked read immediately upon display

When you are reading the second to last email, it should already be marked as read and the last email is still unread, so that when you click on 'Next unread' button the focus moves to the last email amd marks it as read immediately. The selected last email should be changed to read status when selected. Are you saying that it does not mark immediately as read when you have focus on the last email? That is before you click on 'Next unread' button to go to next in a different folder.

Does it do this if you use the arrow keys on your keyboard to move to next in the list; the last one?

What sort order are you using? eg: View > Sort by > Date - Descending - unthreaded

Please confirm you have this: Tools > Options > Advanced > Reading & display tab select: 'automatically mark messages as read' select: 'Immediately on display'