Maybe create a new OU in AD to hold only external contacts? I suggest you
ask on a Windows 2003 forum for the details on exposing it with LDAP.

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Sue Mosher, Outlook MVP
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>I want to create a global contact list where to store all contacts
>available
[quoted text clipped - 4 lines]
> global list to store external email addresses from other companies only.
> How can I create this contact list in a Windows Server 2003 environment?