The feature is present in Outlook 2003 in the same way as in all previous versions -- you must add the mailbox to the properties for the Exchange email account.

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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 was wondering if I could view another user's contacts directly through the
> folder view instead of going to Contacts and then selecting the shared users.
> It's one of those things that they had in Outlook 2000 that worked great,
> but they decided to oust it in 2003.