Getting onto two years ago now I wrote an article that has become quite popular that detailed three methods to redirect HTTP to HTTPS. At that time there wasn't a lot in the way of options for URL manipulation on IIS, and Helicon's ISAPI Rewrite 2 was the de facto standard. Now there are several options for rewriting URL's on IIS, and users of IIS 7 are able to take advantage of Microsoft's own URL Rewrite module. In this guide we'll look at how you can use Microsoft's URL rewrite module to transparently redirect HTTP to HTTPS.