If a user type http://mysite.com in browser, the user should be redirected to https://mysite.com
Could it be done by the following.
<rewrite>
<rules>
<rule name="Enforce canonical hostname" stopProcessing="true">
<match url="(.*)" />
<conditions>
<add input="{HTTP_HOST}" negate="true" pattern="^www\.mysite\.com$" />
</conditions>
<action type="Redirect" url="https://www.mysite.com/{R:1}" redirectType="Permanent" />
</rule>
</rules>
This should have all the info you need and here