Greetings All,

We have a requirement where we want to show custom page for unauthenticated users for SharePoint in our environment. If possible, we want to restrict it to selected SharePoint sites.  We have implemented request access email settings and that is properly working. But Instead of redirecting them to particular DL, we want to redirect them towards a self help portal, which is already in place. Now what we are looking is, how to implement the same. Also, please let us know if we can do the same using PowerShell.

Any pointers are appreciated.

I understand you have a requirement where authenticated users should be redirected to a different home page. 

Here is how I would recommend you to achieve it. 

http://itfreesupport.com/2015/06/redirect-to-different-home-page-for-authenticated-users/

Thanks Jaggi. We want to do this for all unauthorized users (lets say not say authentication, because authentication will be handled by IIS) and for all pages of the site, not just home page. This is the requirement, because user may come to request any page/list/library/document within site.

Mohit, I am a bit confused with your requirement, can you please elaborate and explain with example.