Isso funciona:
<rule name="Redirect Supply Management System traffic to https" enabled="true" patternSyntax="ECMAScript" stopProcessing="true">
<match url="(^supply-management-system/.*)" />
<conditions>
<add input="{HTTPS}" pattern="off" />
</conditions>
<action type="Redirect" url="https://{HTTP_HOST}/{R:1}" appendQueryString="true" />
</rule>