The failed request tracing feature assists you in troubleshooting issues with your websites by making IIS failed request files available . The failed request files contain information such as the requested URL, relevant application pool name, the HTTP status code, and more.
To view a list of all failed requests files
Go to the Websites and Domains > Failed Requests Tracing.
You can click any of the failed requests files to view their contents; you can also download one or more files packed into a ZIP archive, or remove the files that are no longer necessary. You can start a new trace by specifying one or more HTTP status codes and the IIS component or components for which failed request files will be created. Once a trace is started, you can change these settings at any time.
