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Editorial Team
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Asked: 2026-05-22T11:54:05+00:00

I’ve had this problem in the past, and the solution was always a configuration

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I’ve had this problem in the past, and the solution was always a configuration issue, or needed to run aspnet_regiis -i or something. But aspnet_regiis doesn’t fix the problem, and I can’t find anything that would be wrong in any configuration file.

Is there some log that I’m not looking in that would tell me exactly what “500 – Internal server error” I’m actually hitting?

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  1. Editorial Team

    If it’s the 500 - Internal Server Error page that looks like this that you’re seeing:

    enter image description here

    Then you can have IIS7 to pass the detailed error back to the client by configuring the following:

    <system.webServer>
    <httpErrors existingResponse="PassThrough" />
</system.webServer>

    If you’re using IE then remember to turn off Show friendly HTTP error messages (in Tools -> Options -> Advanced), but you knew that already :).

    If that still doesn’t shed any light on the problem then you can use Failed Request Tracing which is a very effective diagnostic tool:

    Troubleshooting Failed Requests Using Tracing in IIS 7

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