Can I add a child domain to an existing child domain?
Yes, it's totally possible to create child/child/child domains, but you will need the forest's admins credentials to do that. Just the child-domains domain admin is not enough.
Can I add a child domain to an existing child domain?
Yes, it's totally possible to create child/child/child domains, but you will need the forest's admins credentials to do that. Just the child-domains domain admin is not enough.