Different domain uses same content for single business will affect each other?
I do SEO for a site.
The sites' content is also used with other domain named sites by the site owner(In which non of the sites does not have any backlinks, except the one i'm working)
And these domains linked to my site at some inner pages(from the same page of every site)
My question is does these kind of (additional)website will affect my websites' performance?
In detailed explanation: ONE website server file(with content) - with fixed(linked to my site only) inner(content) links - pointed by different domain names(every inner page have its URL from each individual root name) will affect my major site..