Admin Only Profile Properties can be used to store user information that will only be visible to Administrators.  Admin Only profile properties can be useful for integration with applications such as Customer Relationship Management (CRM) solutions, Social CRM, E-commerce, Learning Management Systems (LMS) and another application that requires storing hidden user information. 

Creating Admin Only Profile Properties is the same as creating any other property, but with one minor change.  The property should not be marked as visible within the DotNetNuke Profile Properties Editor Screen.  This will help prevent accidentally exposing sensitive data to the user.  Only profile properties that are NOT visible will have the Admin Only option within the Members settings section of the Active Social Control Panel.