|Just found out that, even though auto archive was being run regularly, ALL Inbox folders were marked as "Do Not Archive" by default. Thus, even though we thought we were autoarchiving everything, the action was only being performed on the sent items folder! |
Try clicking File / Archive ...at the bottom of this popup, there's an option that says Include items with "Do not AutoArchive" checked. Try checking that box and see if it cleans up much more of your inbox.