ASP.NET httpRedirect exactDestination for all pages except root - redirect

Question

I'm changing the primary domain for an IIS website, and I need to keep existing URLs working. At the same time I am changing the behaviour of the start page of this (the previous) domain. This domain has previously been accessible at its root level, but now I need the root page (default document) to redirect to a specific subdirectory.
In summary: I need to, while redirecting, keep the trailing path for all pages except for the default document (root). Example:
www.old.com/ -> www.new.com/en
www.old.com/en/page2.htm -> www.new.com/en/page2.htm
www.old.com/en/page3.htm -> www.new.com/en/page3.htm
www.old.com/page1.htm -> www.new.com/page1.htm
I have this web.config:
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<system.webServer>
<httpRedirect enabled="true" destination="http://www.new.com" httpResponseStatus="Permanent" exactDestination="false" />
</system.webServer>
<location path="Default.aspx">
<system.webServer>
<httpRedirect enabled="true" destination="http://www.new.com/en" httpResponseStatus="Permanent" exactDestination="true" />
</system.webServer>
</location>
</configuration>
I have set the IIS setting Default Document to Default.aspx.
But this doesn't work.

Answer 1

I solved it by using the URL Rewrite Module in IIS instead:
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<system.webServer>
<rewrite>
<rules>
<rule name="Root request" enabled="true" stopProcessing="true">
<match url="^$" />
<action type="Redirect" url="http://www.new.com/en" redirectType="Found" />
</rule>
<rule name="Path request" enabled="true" stopProcessing="true">
<match url="^(.*)$" />
<action type="Redirect" url="http://www.new.com/{R:1}" redirectType="Found" />
</rule>
</rules>
</rewrite>
</system.webServer>
</configuration>