See http://www.slovaktech.com for a tool to add this capability, which is
not native to Outlook.

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Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> When we use public folders on an exchange server for a
> contact folder we want to be able to use the follow-up
> flags on contacts to remind us when to follow-up. THis
> only seems to work if the contacts are in a peronal
> contacts folder. Is there a way to do this from a shared
> contacts folder?