Inside Microsoft, we maintain a repository of tools written by our engineers and technical staff. Many of the tools that are posted are very specific to Microsoft engineering— tools to help developers and testers better manage their project in our internal source control system, provide better visibility into our internal bug/issue tracking system, etc. Since these tools are very specific to the Microsoft environment, most of them don't get released externally.

--> see on the blog :

http://msexchangeteam.com/archive/2010/06/11/455115.aspx