Rewrite subfolder only (HTTP to HTTPS) redirects to site root - redirect

Question

I'm trying to rewrite HTTP to HTTPS for a specific subfolder on my IIS 8.5 web server but it's not working. I've read countless other solutions and blog postings but nothing I've tried works.
http://domain.example.com/one/two/three/
should redirect to... (same url but using https)
https://domain.example.com/one/two/three/
but instead is redirecting to... (site root using https)
https://domain.example.com
loading... (desired url with https)
https://domain.example.com/one/two/three/
also redirects to... (site root using https)
https://domain.example.com
it's removing the subfolders from the url.
This folder needs to also be protected with Windows Authentication, which I can get to work but the https redirection is failing with or without the authentication enabled so I don't think that's the cause.
Within IIS I selected the desired subfolder (/three/ in the example above) and created the Rewrite rule there.
<rewrite>
<rules>
<clear />
<rule name="HTTP to HTTPS redirect" enabled="true" stopProcessing="true">
<match url="(.*)" />
<conditions logicalGrouping="MatchAny">
<add input="{HTTPS}" pattern="^OFF$" />
</conditions>
<action type="Redirect" url="https://{HTTP_HOST}/{R:1}" appendQueryString="true" redirectType="SeeOther" />
</rule>
</rules>
</rewrite>
This should of course work with any files and folders contained within the desired subfolder. (/three)
I tried this and it redirects to the apparent correct url but gives the "too many redirects" error:
<rule name="HTTP to HTTPS redirect" enabled="true" stopProcessing="true">
<match url="(.*)" />
<conditions logicalGrouping="MatchAll">
<add input="{HTTPS}" pattern="^OFF$" />
</conditions>
<action type="Redirect" url="https://{HTTP_HOST}{REQUEST_URI}" appendQueryString="false" redirectType="SeeOther" />
</rule>

Answer 1

You should avoid doing this:
Within IIS I selected the desired subfolder (/three/ in the example
above) and created the Rewrite rule there.
Instead setup the rewrite rules in Web.config at the application root. You can redirect a specific folder to HTTPS by including it in the match parameter as follows:
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<system.webServer>
<rewrite>
<rules>
<rule name="Redirect Subfolder" stopProcessing="true">
<match url="^one/two/three/" />
<conditions logicalGrouping="MatchAll">
<add input="{HTTPS}" pattern="^OFF$" />
</conditions>
<action type="Redirect" url="https://{HTTP_HOST}{REQUEST_URI}" appendQueryString="false" redirectType="Permanent" />
</rule>
</rules>
</rewrite>
</system.webServer>
</configuration>
Please note that this is a minimal Web.config file that does what you are looking for. If your application already contains a Web.config in the root folder, then you will have to merge the above into your solution.