Web Application Proxy different back end URL

Question

I'm trying to publish an application through pass-through authentication. My goal is to redirect an external URL to different backend URL. Since that external URL domain is no longer should be used, I'm just redirecting to new URL with new domain. So the users who still have some old links pointing to that old URL will be redirected to new URL.

I have added the rule like below. The external URL when accessed from the browser works but in the browser address bar it shows the external URL only not backend server URL or its certificate.

I have enabled the address translation also using this

How to properly redirect old URL with old domains to new URLs with new domains using WAP pass through authentication?