See http://www.outlookcode.com/d/newdefaultform.htm

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Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
>I have an existing imported database that operates under Exchange Server
> client. I want to add fields and enter information for both old and new
> records. I have been able to customize the contact form for a particular
> record, but only for that record. I published the customized form to outlook
> folders, not sure where it should be published or if I necessary Exchange
> permissions. Outlook is 2003.