How old does a file need to be before IISLogs will process it?
Regardless of what feature you are using, IISLogs handles files 1 hour or older. For example, if the file last writetime was 12:00:00 AM (Midnight), you could set IISLogs to process the file at 1:01 AM. We encourage everyone testing IISLogs to install on a non-production system and learn what configuration works best. Always make a backup copy of log files before testing IISLogs or other 3rd party products.