Server Performance Advisor - the Performance Diagnostic tool for Active Directory and IIS

Following a recent Technet session, I was asked where you can download adpref.exe (an Active Directory Performance tool) from. Confession - I didn't know the answer and no amount of searching turned over any stones. It turns out that adperf was an internal diagnostic tool believed not ever made available for public download even though it was mentioned in the Windows 2000 Active Directory Operations Guide...

An excellent alternative tool which is far more customer friendly is the "Server Performance Advisor" available for download at https://www.microsoft.com/downloads/details.aspx?familyid=61a41d78-e4aa-47b9-901b-cf85da075a73&displaylang=en. Server Performance advisor if far more capable than ADPerf, and also helps diagnose performance problems for IIS 6.0.