Microsoft has released an application programming interface (API) that provides an interface that enables network management systems to gain access to Lync network diagnostic data
Lync SDN (Software Defined Network) API is a useful package that makes it possible to monitor Lync network traffic from dedicated management systems.
The programming interface provided by Lync SDN API facilitates the access to network diagnostic information, while the included documentation allows developers to better understand the necessary configurations for the API.
Here is the link to download the SDN: http://www.microsoft.com/en-ie/download/details.aspx?id=39714
Here is a great video from HP showing Lync and SDN in action: