It's going to be hard to point you toward specifics without knowing whether Microsoft Exchange is your mail server. See http://www.slipstick.com/outlook/share.htm

Signature
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
>I have been tasked with setting up a company directory in Outlook and I
> can't seem to find instructions on how to do it anywhere - can anyone
> point me in the right direction?
>
> Thanks,
> Holly