Privacy relationships are the component of enhanced presence used to control the amount of information visible to contacts. In prior iterations of Communications Server, these were referred to as access levels, but they are now called privacy relationships in Lync Server. Instead of publishing the same presence to all subscribers, a user can control the flow of information based on differing privacy relationships assigned to contacts.
The enhanced presence model publishes more than just a user’s presence name; it also includes email address, title, company, address, working hours, and a multitude of other attributes.
A user might not want to expose all of this information to a user, so privacy relationships ...