Use one of the third-party tools that supports this -- see http://www.slipstick.com/addins/groupcontacts.htm

Signature
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
http://www.slipstick.com/books/jumpstart.htm
> What would everyone recommend is the most practical way to
> maintain an address book for common use through MS Access?
> Any suggestions, advice, etc would be appreciated!