Outlook includes no built-in feature to move messages to a different folder after the user reads them. There are, however, third-party tools to help with this -- see http://www.slipstick.com/addins/mail.htm#other, particularly Email Filing Wizard and QuickFile.
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Sue Mosher, Outlook MVP
Outlook and Exchange solutions at http://www.slipstick.com
Author of
Microsoft Outlook Programming: Jumpstart
for Administrators, Power Users, and Developers