Mike,

thanks for your answer - you were right, it is running in Intergrated mode (and yes, the DNN .4.4 installation is running in classic mode). When switching the AppPool to Classic Mode, I get an HTTP 404 - File or directory not found error.

I ran the two commands from the documentation, but this did not solve the problem. The behaviour is the same as before. Are there issues with .Net 4? Any other idea(s)?

Best wishes
Michael

*** Update ***
A new problem appeared: I cannot use Standard authentication anymore.

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Another interesint thing is the query string of the login page:

ReturnUrl=%2fDesktopModules%2fAuthenticationServices%2fActiveDirectory%2fWindowsSignin.aspx

In the folder /DesktopModules/AuthenticationServices/ActiveDirectory, there is a web.config file with the following content:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <location path="WindowsSignin.aspx">
        <system.webServer>
            <security>
                <authentication>
                    <windowsAuthentication enabled="true" />
                    <anonymousAuthentication enabled="false" />
                </authentication>
            </security>
        </system.webServer>
    </location>
</configuration>



Best wishes
Michael

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