http://www.microsoft.com/windows2000/technologies/directory/ad/default.asp
Active Directory®, which is an essential component of the
Windows 2000 architecture, presents organizations with a
directory service designed for distributed computing environments.
Active Directory allows organizations to centrally manage and share
information on network resources and users while acting as the central
authority for network security. In addition to providing comprehensive
directory services to a Windows environment, Active Directory is
designed to be a consolidation point for isolating, migrating, centrally
managing, and reducing the number of directories that companies
require.
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Nikki Peterson [MVP - Outlook]
What is an active directory?
Thanks,
Mike