I can't find this answer in the official documentation.
I'm tracking google analytics data on mycustomerwebsite.com But the website is also working and reachable in seofriendlydomain.com
Website is the same, so I include analytics.js data in both of them.
My customer asks, to know how much traffic comes from each domain, not needing complete data but only few stuff like % of incoming visitors or number.
I found similar topics: Google Analytics multiple domains one website
Why there is no answer ? is there no solution ?