Occurs when one or more pieces of contact information are changed.
Assembly: Microsoft.Lync.Model (in Microsoft.Lync.Model.dll)
Application logic must subscribe to contact information publication before the ContactInformationChanged event can be received. Call the CreateSubscription method on the ContactManager object and then add the Contact to be subscribed and the ContactInformationTypes that you are interested in. Finally, call the Subscribe method on the ContactSubscription object.