Active Directory, Second Edition by Alistair G. Lowe-Norri [Repost]

When Microsoft introduced Windows 2000, the most important change was the inclusion of Active Directory. With many great benefits, it continues to be a huge headache for network and system administrators to design, implement and support. The first edition of this book, O'Reilly's best-selling Windows 2000 Active Directory, eased their pain considerably.