Microsoft Lync Server en-us 2013 [MSDN] | 1.24 GB

Microsoft Lync - is a unified communications platform enterprise-class. Wherever you are installing Lync mobile devices running Windows 8 or other operating systems, you can communicate with other users, without interrupting their daily tasks. Thanks to Lync you get a single customer for the notification of the presence, instant messaging, voice and video, as well as conducting meetings. As a user of Lync, you can also contact any other user via Skype, and thus fully communicate with millions of people around the world.

OS: Windows Server 2008 R2 or Windows Server 2012

Windows PowerShell 3.0 and

Microsoft .NET Framework 4.5

Windows Identity Foundation (KB974405)