That usually indicates that the Outlook Address Book is not installed in the
mail profile. If you don't know how to add it, tell us your Outlook version.
The address list shown in the address book will list all resolved email
addresses and fax numbers for contacts in a given folder. If you don't see a
name listed there, you'll need to open the corresponding contact record to
see what the problem might be.
--
Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers