Outlook version? Are you using Exchange as your mail server?
Updating is not built in, but viewing in an Exchange environment is, given proper permissions. Have you tried the File | Open | Other User's Folder command?

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 need to view my boss's calender daily which as yet I am unable to do (says
> my profile is not configured to support this operation) and also I would
> like to know that when he updates his calender can it update mine too? When
> an entry is made in his diary can it be linked to mine and update my calender?