Receiving login prompt using integrated windows authentication

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I have a Windows 2008 server that I’m working on, so my answer is not completely the same as what the OP has on a Windows 2003 server.

Here is what I did (recording this here so I can find it later).

I was having this same issue:

login prompt

In my Web.config file, I had this section:

<system.web>
    <authentication mode="Windows" />
    <authorization>
        <allow users="*" />
        <deny users="?" />
    </authorization>
</system.web>

Under IIS, all of these seems to be solved under the Authentication icon.

  1. Edit Permissions: Make sure your ASP.NET account has permission. Mine was not originally added.

ASP.NET permission

Now go into the features of Authentication:

Authentication Features

Enable Anonymous Authentication with the IUSR:

Anonymous Authentication

Enable Windows Authentication, then Right-Click to set the Providers.

NTLM needs to be FIRST!

Windows Authentication

Next, check that under Advanced Settings… the Extended Protection is Accept and Enable Kernel-mode authentication is CHECKED:

Advanced Settings

Once I did this, I went back to my web application, clicked the Browse link, and logged in without having to provide my credentials again.

I hope this proves beneficial to many of you, and I hope it is useful for me later as well.

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