Our AD Structure is one proposed AD Structure is one Forest with an empty forest root and 3 domain trees with separate namespaces. We have user accounts and resources in each root, but only have one Exchange 2000 Org. A Microsoft Consultant has said that we can use just one Exchange 2000 Org, and the user's in the other trees will have access. How can this be? I thought with the separate namespaces, you would need separate Exchange 2000 Orgs. Maybe some of you experienced with AD and Exchange 2000 can help clear this up. Thanks. List info : http://www.activedir.org/mail_list.htm List FAQ : http://www.activedir.org/list_faq.htm List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/