IIS 10 - turning off "allow high bit characters"

Question

I manage a set of 7 Windows 2016 Server OS VMs. I am experimenting with disabling "allow high bit characters" (IIS manager ->Request Filtering). It can be turned on/off from the server, default web site and individual web site level. My expectation is that when I turn it off from the server level, the change would propagate down to default web and individual site. It actually worked on 6 servers out of 7. On the 7th server, changing this at the server level, didn't propagate the change down the tree. I wonder what the reason is and how it can be addressed.

Answer 1

Someone probably made the change at the site level. It should then show up in the web.config file.

To revert back to the site level, use the configuration editor and select "Revert to parent".