IIS - Configuring the Require SSL option in the Forms authentication

Note:  This setting is applicable only if the IRC application and the CM application is SSL enabled(HTTPS).
  1. Open the IIS Manager and navigate to the appropriate tier.
  2. In the Features View, double-click Authentication.
  3. On the Authentication page, select the Forms Authentication.
  4. In the Actions pane, click Edit.
  5. Check the Requires SSL check box in the cookie settings section, click OK.