Automatically rewrite requests from http --> https in .Net websites add this url rewrite rule to your in the web.config.
<configuration>
<system.webServer>
<rewrite>
<rules>
<rule name="HTTPS" enabled="true" patternSyntax="Wildcard" stopProcessing="true">
<match url="*" />
<conditions logicalGrouping="MatchAny">
<add input="{HTTPS}" pattern="off" />
</conditions>
<action type="Redirect" url="https://{HTTP_HOST}{REQUEST_URI}" redirectType="Found" />
</rule>
</rules>
</rewrite>
</system.webServer>
</configuration>