Windows Authentication not working in IIS Express, debugging with Visual studio 2013, Windows 8

Question

I just upgraded my application from Visual studio 2012 to Visual studio 2013. My windows authentication is not working any more. It is giving me below error.

Answer 1

Be careful with the applicationhost.config modifications - in Visual Studio 2015 I've found that it sometimes resides in the local project directory.

For example:

DRIVE:\MYPROJECT\.vs\config\applicationhost.config

If you're not sure which applicationhost config file is being used, you can monitor file access with ProcMon & then narrow down the results based on "Path" to see what VS is actually reading at Debug time.

Update: This appears to be the behavior in Visual Studio 2017 as well.