Force HTTPS Rule

<system.webServer>

  <rewrite>

    <rules>

      <rule name="Force HTTPS" enabled="true">

        <match url="(.*)" ignoreCase="true"/>

        <conditions>

          <add input="{HTTPS}" pattern="off"/>

        </conditions>

        <action type="Redirect" url="https://{HTTP_HOST}/{R:1}"/>

      </rule>

    </rules>

  </rewrite>

</system.webServer>