See http://www.slipstick.com/exs/permissions.htm#tools for tools to help with this task.

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 created a user account for Exchange 2003 server which has full-access
> to all agenda's of all the Outlook 2003 users in my the organization.
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>
> Gerko