I need to get my dev machine to read a certificate from the local machine store.
To do this I need to run winhttpcertcfg.exe and specify the account I want to elevate.
What would this account be for IIS express?
(For IIS it would be the IWAM_MachineName).
IIS Express runs as your user account. When installed, you should find an IISExpress folder in your My Documents folder.