Microsoft Lync Server 2013 Enterprise device CAL through the Microsoft Open Business Program. IMPORTANT NOTE:
Microsoft Lync is a unified communications platform on which users can make a phone call keep track of their contacts' availability send an IM and start or join an audio video or web conference.
A server license and a minimum of 5 CALs are required.Microsoft Open Business Licensing
is for small to mid-sized organizations that have fewer than 250 desktop PCs and who order as few as five licenses. Benefits of Open License include: discounts off the retail price of software the ability to track and manage licenses by using online tools the rights to create a standard image and deploy it on multiple machines and rights to transfer licenses from one machine to another.