Thanks Doug!In fact we now use a tool to set this default directly on the server side - hence why it works for users now.
But this was not in place a few back and some users have set it up and probably on Local…
I just tried with 1 problematic user to open his mailbox on the server, deselect the ‘Display Unprocessed Notices’ and then re-select it. And the feature is now enabled and works fine for him.