I'm adding server side includes to and existing site for a non-profit organization. It's hosted on the IIS 7.0 server. The source files are simple html, but there's a lot of them. I can easily implement this, but to make the server happy I have to change the extension to shtml. Again, not a problem in itself. Here's the problem. The site is referenced by a bunch of other sites and a wide variety of users likely have specific pages bookmarked so they'll continue to open the old html pages.
On a LAMP server, I'd just write a htaccess file, but I have no idea how to handle this in IIS other than to turn each html file into a redirect itself.
I'm not familiar with IIS so any thoughts are appreciated.