A. The error you're receiving occurs when the child domain name conflicts with the name of any object. If I try to add the child domain "test" to the domain savilltech.com, I'd receive the error that the figure at Figure shows if any other object (e.g., a user, a group, an organization unit--OU) in the savilltech.com domain has the name "test." If you want to use an existing name for a new domain, you must rename the existing object before you name the new domain.