January 12th update for Lync 2013 (Skype for Business) (KB3114502)

Microsoft has released an update for Microsoft Lync 2013 that also includes the new Skype for Business client. The version number of this update is 15.0.4787.1002.

https://support.microsoft.com/en-us/kb/3114502

Lync Server 2013 CU6 Hot Fix 2

Lync Server 2013 (W15) CU6 HF2 has been released to the Microsoft Download Center.

http://support.microsoft.com/kb/2809243

http://download.microsoft.com/download/B/E/4/BE44AC91-C665-4522-BA93-CE72B0934DAF/LyncServerUpdateInstaller.exe

http://download.microsoft.com/download/B/E/4/BE44AC91-C665-4522-BA93-CE72B0934DAF/OcsCore.msp

http://download.microsoft.com/download/B/E/4/BE44AC91-C665-4522-BA93-CE72B0934DAF/WebComponents.msp