Above section system.webServer of web.config we add this code:
<rewrite>
<rules>
<rule name="RewiteHTTP2HTTPS" stopProcessing="true">
<match url="(.*)" />
<conditions>
<add input="(HTTPS)" pattern="^OFF$" />
</conditions>
<action type="Redirect" url="https://{HTTP_HOST}/{R:1}" logRewrittenUrl="true" />
</rule>
</rules>
</rewrite>