Add the mailbox to your folder list.
See http://www.howto-outlook.com/howto/permissions.htm

Signature
Robert Sparnaaij [MVP-Outlook]
Coauthor, Configuring Microsoft Outlook 2003
http://www.howto-outlook.com/
Outlook FAQ, HowTo, Downloads, Add-Ins and more
http://www.msoutlook.info/
Real World Questions, Real World Answers
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> If another user shares a custom contacts folder name to my Outlook
> user name, I can't find a way to see it in Outlook 2007?
>
> I can see the default contacts folder just fine.
>
> How can I see shared contacts folder names?