Microsoft Corporation. Windows 2000 Active Directory Services . Redmond, WA: Microsoft Press, 2000.
The Microsoft Windows 2000 Server Resource Kit contains in-depth information about the design elements in Active Directory.
Try searching the TechNet CD, or use Microsoft's online version at www.microsoft.com and search for keywords such as "tree", "forest", and "organizational unit".
Microsoft Corporation. 
Try searching the TechNet CD, or use Microsoft's online version at www.microsoft.com and search for keywords such as "tree", "forest", and "organizational unit". 