I have two domains that I want to map to one website.  I have already created the Primary website (e.g. aaa.com) here at zoho and it works fine.  I also have a second domain (e.g. bbb.com) which I have set up for mail access (it works fine).  Now I want to map www.bbb.com to the website at www.aaa.com.  

I have read the documentation here:  https://zohosites.wiki.zoho.com/configure-a-domain.html  which explains what to do, but I can't find the domain manager page that it is referencing.  I can get to my sites page:  https://sites.zoho.com/index  but it does not seem to have the domain management capability mentioned in the docs.

What URL should I go to so that I can map web requests from one domain to another.

Thanks.

Kevin