We have a handful of intranet sites on a Server 2008 instance with IIS 7. Access to these sites is through Windows authentication; if a user is in our AD domain, then he or she can use the site.
Starting this morning, all users are getting HTTP 403 errors when attempting to connect to the default web site and apps underneath it. I'm able to see the sites when I RDP into the server and reach them via localhost, but I'm an admin.
I know there are many issues that could have caused this sudden change, so I'm asking where to look: Where can I find the error message on the server side that's causing the HTTP 403 to be thrown to the user?