What versions of AutoCAD does ArcGIS for AutoCAD work with?
ArcGIS for AutoCAD requires AutoCAD products that support the AutoCAD .NET 2.0 APIs, including AutoCAD 2007 through 2009, as well as Autodesk 3D Map and Civil versions 2007 through 2009. AutoCAD versions prior to 2007 and AutoCAD LT do not support the necessary APIs required by ArcGIS for AutoCAD. Support for AutoCAD 2010-based products is not currently available.