To determine where your IIS log files are stored, please perform the following steps on your server:
Go to Start -> Control Panel -> Administrative Tools
Run Internet Information Services (IIS).
Find your Web site under the tree on the left.
Right-click on it and choose Properties.
On the Web site tab, you will see an option near the bottom that says “Active Log Format.” Click on the Properties button.
At the bottom of the General Properties tab, you will see a box that contains the log file directory and the log file name. The full log path is comprised of the log file directory plus the first part of the log file name.
For example, if the dialog box displayed the following values:
Log file directory: C:\Windows\System32\LogFiles
Log file name: W3SVC1\exyymmdd.log
Then your full log path would be something like :