The Active Directory Topology Diagrammer (ADTD) tool is now available for download for free from the Microsoft Web Site at the following address:

http://www.microsoft.com/downloads/details.aspx?familyid=cb42fc06-50c7-47ed-a65c-862661742764&displaylang=en&tm#Overview

This is a tool that up until recently was only available to engineers in MS Premier. Apparently, it was also available on the Microsoft Virtual Server 2005 R2 resource kit.

To run the tool all you need is the Microsoft .NET Framework Version 2.0, Microsoft Office Visio 2003 or 2007 and an Active Directory! Anyway, its a great tool and a must have for anyone running AD/Exchange with a requirement to document their environment quickly and easily.

Heres an overview of what it can do:

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 Microft 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.