See also: Article-Information, Related Customers
Add Linked Customers enables you to link customers (sites) to an article.
Steps:
Open the article to which you want to link the customers.
On the Article docked split container,
in the Details node, click Information.
In the workspace, select Related
Customers tab.
On the ribbon bar, in the Linked Customers
group, click Add Linked Customers.
Lookup Site select box appears.
Identify and select the site that you want to link to present article.
Click Select and Close.