Voice Policy
To plan the voice policies you will need for your Enterprise Voice deployment:
Push notifications, in the form of badges, icons, or alerts, can be sent to a mobile device even when the mobile application is inactive. Push notifications notify a user of events such as a new or missed IM invitation, missed calls, and voice mail. The Microsoft Lync Server 2010 Mobility Service sends the notifications to the cloud-based Microsoft Lync Server 2010 Push Notification Service, which then sends the notifications to the Apple Push Notification Service (APNS) or the Microsoft Push Notification Service (MPNS).To configure for push notifications with Lync Server 2010 Edge Server