This is a very useful tool that can help you create Domain, OUs, Sites, Exchange, Application, and Server Diagrams. The idea is that it will "run as" a user with enough privileges to create the Microsoft Visio documents and later you will edit them according to your needs. The only drawback is for Domains with many AD objects because fine-tuning the drawing may take some time.
"With the Active Directory Topology Diagrammer tool, you can read your Active Directory structure through Microsoft ActiveX® Data Objects (ADO). The Active Directory Topology Diagrammer tool automates Microsoft Office Visio to draw a diagram of the Active Directory Domain topology, your Active Directory Site topology, your OU structure or your current Exchange 200X Server Organization. With the Active Directory Topology Diagrammer tool, you can also draw partial Information from your Active Directory, like only one Domain or one site. The objects are linked together, and arranged in a reasonable layout that you can later interactively work with the objects in Microsoft Office Visio."
Download AD Topology Diagrammer.
Posted by Gabriel Maciel