The IIS logs seulement record querystring et header information sans tout POST data.
If you're using IIS7, you can enabled Failed Request Tracing for status code 200. That will record tous of le data et you can select qui type of data to include.
In soit IIS6 ou 7, you can use Application_BeginRequest in global.asax et create votre own logging of POST data.
Or, in IIS7, you can write a HTTP Module avec votre own custom logging.
