Configuration Manager MPCERT and MPLIST Returning HTTP Error 500–Internal Server Error
I recently had an issue with my hyper-v lab where my MP quit working. It’s a test lab so I’m making changes all the time. So no big surprise there. However, uninstalling the MP and even uninstalling/installing IIS didn’t resolve the issue. I kept getting a failed attempt when running the MP Troubleshooter and when trying to browse to the web page to verify the MP. Again, thanks to a colleague for pointing me in the right direction.

![clip_image002[4] clip_image002[4]](http://myitforum.com/cs2/blogs/cnackers/clip_image0024_thumb_7076F076.jpg)
You can use these links to test your MP:
http://servername/SMS_MP/.SMS_AUT?MPCERT
http://servername/SMS_MP/.SMS_AUT?MPLIST
What ended up resolving the issue was running the following command and then restarting IIS.
cscript.exe %SYSTEMDRIVE%\inetpub\adminscripts\adsutil.vbs SET W3SVC/AppPools/Enable32bitAppOnWin64 0
Be sure to add the scripting tools in order for this command to work. I think it’s a good idea to add both the IIS 7 and the IIS 6 tools for your lab environment.
