"Contacts" and "Group" stored in the address book can be shared within a specified group or stored as personal contacts that only you are allowed to access.
If no publicity scope is specified, stored "Contacts" and "Group" are publicized to all users.
User authentication is required to set the scope for publicizing "Contacts" and "Group".

Scope for publicizing addresses Description
Publicized to all "Contacts" and "Group" are published to all users of the machine.
User "Contacts" and "Group" are published only to the user. Registered addresses are preferentially displayed as "personal contact" in the user's address book.
User Group Publication of "Contacts" and "Group" is limited to the specified group. Up to eight groups per "Contacts" or "Group" can be set as the publicity scope.