cs-username not showing in IIS logs in IIS7 classic mode

Question

I am running an asp.net application with forms authentication on IIS 7 in classic mode. Logging is turned on and the cs-username field is currently selected to be logged. However, the cs-username is always blank in the logs. Anyone have tips on how to determine the cause?

Answer 1

cs-username knows nothing about ASP.NET / forms authentication, and vice-versa... You have Anonymous access turned on in IIS, yes? That's why there is no cs-username output.