AFAIK, WebDAV resolves only against the user's default contacts folder and GAL, since the Outlook mail profile, which resides on the client and contains information about what other lists are available for name resolution, isn't accessible to WebDAV. You might want to ask in the microsoft.public.exchange.development forum for other ideas.

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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
> Hi,
> i use an application to create and update contacts in an Exchange public
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> Thank's a lot,
> Fabio