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  • Re: IIS 8.5 Windows Authentication

    Feb 11, 2019 03:20 PM|Madness80|LINK

    You need to tell IIS to display the details of the error. In the web.config file add the bolded lines to the appropriate sections.

            <customErrors mode="Off" />
            <httpErrors errorMode="Detailed" />

    If that doesn't work, then you will need to enable failed request tracing for 500 errors. (You might want to do this anyway!) See

    In that example they create an error situation for 404.2  to test with. You won't need to do that. Start at the "Enable Failed-Request Tracing" section and set it up for a 500 status code.