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.

Answer 2

For Visual Studio 2019 the applicationhost.config will be found in

DRIVE:\MYPROJECT\.vs\$(PROJECTNAME)\config\applicationhost.config

Answer 3

It looks like you solved your own question! Good on you. In addition to this post helping me I found the following to be SUPER helpful in configuring my IIS Express.

IIS Express Windows Authentication

Edit: I've copied the important information from the associated link in case it dies. This is completely from user vikomall

option-1:

edit \My Documents\IISExpress\config\applicationhost.config file and enable windowsAuthentication, i.e:

<system.webServer>
...
  <security>
...
    <authentication>
      <windowsAuthentication enabled="true" />
    </authentication>
...
  </security>
...
</system.webServer>

option-2:

Unlock windowsAuthentication section in \My Documents\IISExpress\config\applicationhost.config as follows

<add name="WindowsAuthenticationModule" lockItem="false" />

Alter override settings for the required authentication types to 'Allow'

<sectionGroup name="security">
    ...
    <sectionGroup name="system.webServer">
        ...
        <sectionGroup name="authentication">
            <section name="anonymousAuthentication" overrideModeDefault="Allow" />
            ...
            <section name="windowsAuthentication" overrideModeDefault="Allow" />
    </sectionGroup>
</sectionGroup>

Add following in the application's web.config

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <system.webServer>
      <security>
        <authentication>
          <windowsAuthentication enabled="true" />
        </authentication>
      </security>
    </system.webServer>
</configuration>

Below link may help: http://learn.iis.net/page.aspx/376/delegating-configuration-to-webconfig-files/

After installing VS 2010 SP1 applying option 1 + 2 may be required to get windows authentication working. In addition, you may need to set anonymous authentication to false in IIS Express applicationhost.config:

<authentication>

            <anonymousAuthentication enabled="false" userName="" />

Answer 4

In Visual Studio 2017, asp.net core project, the authentication is setup at launchSettings.json

{
  "iisSettings": {
    "windowsAuthentication": false,
    "anonymousAuthentication": true,
    "iisExpress": {
      "applicationUrl": "http://localhost:54491/",
      "sslPort": 0
    }
  },
  "profiles": {
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "launchUrl": "api/values",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },
    "TestAspNetCoreProd": {
      "commandName": "Project",
      "launchBrowser": true,
      "launchUrl": "api/values",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      },
      "applicationUrl": "http://localhost:54492"
    }
  }
}