No missed call notification when a caller hangs up a PSTN call before the call is answered in a Lync Server 2010 environment

Symptoms

Consider the following scenario:

• A manager configures a Microsoft Lync 2010 client to forward calls to a delegate in a Microsoft Lync Server 2010 environment.

• The manager receives a Public Switched Telephone Network (PSTN) call.

• The Lync 2010 client for the delegates starts ringing.

• The caller hangs up before a delegate answers the call.

In this scenario, the manager and the delegate do not receive a missed call notification in Outlook.

Resolution

To resolve this issue, install the following cumulative update:

2860700 Description of the cumulative update for Lync Server 2010: July 2013