I still have this issue... Just duplicate every mail when I take a look at outlook. And kmail said every message is read, but outlook said only one of each duplicate is read. So I have to delete unread msg once a week in outlook...
I still have this issue... Just duplicate every mail when I take a look at outlook. And kmail said every message is read, but outlook said only one of each duplicate is read. So I have to delete unread msg once a week in outlook...