IIS 10 URL Rewrite http traffic to https redirect not working

Question

IIS 10 server behind an AWS application load balancer will not redirect traffic for domain without www when client requests http rather than https. The rule to redirect traffic when www is specified works fine, but 404 is returned if you try the same url without www.

So:

1. Enter "http://dname.com/blog" = 404

2. Enter "http://www.dname.com/blog" = redirect to "https://www.dname.com/blog"

           <rule name="Force HTTPS" stopProcessing="true">
               <match url="(.*)" />
               <conditions logicalGrouping="MatchAll" trackAllCaptures="false">
                   <add input="{HTTP_X_Forwarded_Proto}" pattern="^https$" negate="true" />
                   <add input="{HTTP_HOST}" pattern="^dname\.com$" />
               </conditions>
               <action type="Rewrite" url="https://www.dname.com{REQUEST_URI}" />
           </rule>
           <rule name="Force WWW HTTPS" enabled="true" stopProcessing="true">
               <match url="(.*)" />
               <conditions logicalGrouping="MatchAll" trackAllCaptures="false">
                   <add input="{HTTP_X_Forwarded_Proto}" pattern="^https$" negate="true" />
                   <add input="{HTTP_HOST}" pattern="^www\.dname\.com$" />
               </conditions>
               <action type="Redirect" url="https://www.dname.com{REQUEST_URI}" />
           </rule>
   

Answer 1

I don't know why the previously posted rules wouldn't work, but I was able to create a refined rule that is working:

            <rule name="Force HTTPS" enabled="true" stopProcessing="true">
                <match url="(.*)" />
                <conditions logicalGrouping="MatchAll" trackAllCaptures="false">
                    <add input="{HTTP_X_Forwarded_Proto}" pattern="^https$" negate="true" />
                    <add input="{HTTP_HOST}" pattern="^(www\.)?dname\.com$" />
                </conditions>
                <action type="Redirect" url="https://www.dname.com{REQUEST_URI}" />
            </rule>

The above rule combines the two rules instead of looking for the domain without the www and then with the www in a separate rule. The regex (www\.) tells the rule to look for "www." and the question mark tells it that it may or may not be there, so that includes the domain with and without the www.