Enable portal visitors to register their interest in becoming a registered user of this portal. Registering does not provide access to the Registered User security role until the Administrator authorizes the user account. The Administrator receives email notification of each new registration upon sign up.

1. Navigate to Admin > Site Settings - OR - Select Site  from the Control Panel.
2. Maximize  the Advanced Settings section.
3. Go to the Security Settings section.
4. At User Registration, select Private.
5. Click the Update link.

Enabling private user registration