Authentication and Access Control Diagnostics 1.0 (x86) for Windows

Authentication and Access Control Diagnostics 1.0 (more commonly known as AuthDiag) is a tool released by Microsoft aimed at aiding IT professionals and developers at more effectively finding the source of authentication and authorization failures. These users have often seen behavior from Internet Information Services (IIS) that doesn't seem appropriate or random when users authenticate to the IIS server.

The complex world of authentication types and the various levels of security permissions necessary to allow a user to access the server causes many hours of labor for those tasked with troubleshooting these problems. This version is the first release on CNET Download.com.