IIS > Apache Reverse Proxy & SSL

I have an Apache box set up on the local network that runs some applications that my main IIS server will not, until now I have had no need for SSL on the Apache box.

IIS deals with all incoming requests and Apache apps work from IP:8080.

I have an app on the Apache box that needs to work with SSL, so I created a virtual host on 443 in Apache for the app and in IIS create a reverse proxy rewrite rule to the apache box (http://192.168.1.12:443{R:1}).

Problem is the app conf. file needs a base url, in my case 192.168.12:443, but this will not work.

A request to www.appdomain.com will forward to the apache app, but only the main page of the app, all subsequent requests want to work on 192.168.12 as this is defined in the app conf. file

Am I misunderstanding some rewrite rules here please help...