Using older versions of Outlook for Mac in business environments
It's increasingly apparent that Microsoft is either unwilling or incapable of fixing this problem. GMAIL works fine and as expected. Hotmail/Outlook does not.
Until such time that Microsoft corrects the problem, one may use Thunderbird client instead of Mac Mail provided that a modification to the CONFIG EDITOR is made. One must change the following EXPUNGE command lines from FALSE to TRUE
mail.imap.expunge_after_delete;true
mail.imap.check_deleted_before_expunge;true
These changes tells the Outlook servers that a message has been moved or deleted immediately upon such action.
One caveat: Thunderbird does not "play well" with Mac OS X Contacts. It cannot add or append contacts directly to the OS X Contacts program.
MICROSOFT...PLEASE...FIX YOUR IMAP CONNECTION ASAP!