After internal discussion, we have decided not to implement this feature. Instead, we suggest configuring a ticket status event that will send a reply to ticket when the status is changed to Closed. If you do go that route, and you have your departments to send a notification to the user when a ticket is auto-closed, it is possible that your clients could receive two emails notifying them that their ticket has been closed.
Andrew Barker
Senior Software Developer
SmarterTools Inc.
www.smartertools.com