I need this to be available at all times since a long time will fly by until I need this config again. If you don’t have a rewrite block then just create a dummy one in IIS. It goes without saying you need to have Rewrite module installed on IIS. Hint: Server Manager.
<rewrite>
<rules>
<clear />
<rule name="Redirect all requests to https" stopProcessing="true">
<match url="(.*)" />
<conditions logicalGrouping="MatchAll">
<add input="{HTTPS}" pattern="off" ignoreCase="true" />
</conditions>
<action
type="Redirect" url="https://{HTTP_HOST}{REQUEST_URI}"
redirectType="Permanent" appendQueryString="false" />
</rule>
</rules>
</rewrite>
This solutions comes from Stack Overflow, like so many other good things: https://stackoverflow.com/a/41582149