I am using Joomla & Community Builder (CB) for a employee "members only" website. Each employee has a preexisting employee id numbers. When an employee registers to be a member on the site (via CB registration form) one of the form fields would be "employee id" and would validate/verify them against the list of known id's to either allow/disallow membership.
Apparently this capability is not native to Jooma or CB. Any suggestions?