For Windows 2000 however, Microsoft included Active Directory, an LDAP directory service based on the directory from its Exchange mail server. Active Directory was as robust as and, in several key ways, superior to VINES. While VINES was limited to a three-part name, user.company.org, like Novell's NDS structure, Active Directory was not bound by such a naming convention. Active Directory had developed an additional capability that both NDS and VINES lacked, its "forest and trees" organizational model. The combination of better architecture and a marketing company the size of Microsoft doomed StreetTalk, VINES as an OS, and finally Banyan itself.