How to host a website on two different domains?

Question

Domain Name System

Good afternoon.
There was a need to place the site on two different domains.
I took advantage of articles posted on the Internet.
Added via Ispmanager - domain and site (attached the root folder of the first site to the domain).
When you click on the link to the second site, it takes you to the BITRIX24 authorization page.
It is not an option to do it through a redirect and aliases, you need a separate domain that will lead to the site.
What to do in this situation? Why does it redirect to the Bitrix24 authorization page?

Answer 1

Here everything is point by point

Answer 2

Register 2 configs in your web server. With domain names. Easier than ISP...