A person is the base identity object that EmpowerID uses to link together the user accounts, the permissions assignments, the audit history, and the management policies associated with a specific user. When you turn on inventory for an account store—and enable Person Provisioning for that account store—EmpowerID creates a Person identity for each new user account discovered in the account store. However, a person does not need to have an external user account anywhere and you can create new Person identities for new users at any time.
In order for users to work in EmpowerID, they must have an EmpowerID Person identity.