Using Auto Archive has been suggested so I've given it a go with various
settings but none of them seem to work.
Currently I have
Tools-Options-Other-Auto Archive with only the "Run Auto Archive" selected
and set to 1 day (everything else is unselected)
All folders in my Mailbox are set to "Do Not Archive"
The deleted items folder in my Personal Folder is set to archive items older
than 3 days old, other folders in the PST are set to "Do Not Archive"
Doing File - Archive and selecting "Archive all folders according to their
AutoArchive setting" results in NOTHING being archived.
Doing File - Archive, selecting "Archive this folder and all subfolders" and
highlighting "Personal Folders" archives the correct deleted items but ALSO
archives items in folders set to "Do not archive"
Any ideas as to what I try next?