Microsoft Active Directory Topology Diagrammer

Quite old (released 10/2/2007) but very powerful and useful tool, Microsoft Active Directory Topology Diagrammer. Additionally, I discovered that many IT Admins are not using it. The Microsoft Active Directory Topology Diagrammer reads an Active Directory configuration using ActiveX Data Objects (ADO), and then automatically generates a Visio diagram of your Active Directory and /or your Exchange 200x Server topology. The diagramms include domains, sites, servers, administrative groups, routing groups and connectors and can be changed manually in Visio if needed.