On the default web/login screen, there is a link for "Don't have an account?" that lets anybody to sign-up. I wish to disable this link, so that only users who have been invited via email can join.
Some resources on the Internet suggested "Settings" > "General Settings" > "Allow external users to sign-up", but I can't find any such setting, even after enabling the Technical mode with administrator access.
Any help in this regard will be appreciated.
Thanks in advance.