Using IIS URL Rewrite Module, Web administrators can easily set up rules to define URL rewriting behavior based on HTTP headers, HTTP response or request headers, IIS server variables, and programmatic rules. HTTP to HTTPS redirect helps boost your Google site ranking as well as adding enforcing SSL security.
First you must download the IIS URL Rewrite module from Web Platform Component Installer. Ensure that a valid SSL Certificate is installed in IIS Server.
(.\*){HTTPS}offRedirecthttps://{HTTP\_HOST}/{R:1}Found (302)Figure: HTTP to HTTPS redirect using IIS URL Rewrite module