I've been googling for hours, but can't seem to find any info on this...
Is there a way I can enable "IIS Advanced Logging" for a website, but disable for a child virtual directory?
I tried "disabling" or even "removing" the "log-difinition" at the subdir level but it doesn't let me to (shows an error message).
Sorry, I'm so stupid. Found a solution 10 minutes after posting the question.
You should add a FILTERING rule to the log-definition at the website level, that will filter http-requests targeted to the virtual subdirectory (by looking at the URL field for example).
More info here: http://www.iis.net/learn/extensions/advanced-logging-module/advanced-logging-for-iis-log-filtering