Lync 2013 Updates

Microsoft Updates resource center for Lync 2013

Here is a list of all cumulative updates released for Lync Server 2013: 

Version	Cumulative Update	KB Article
5.0.8308.887	May 2015 (CU11)	https://support.microsoft.com/en-us/kb/3051951
5.0.8308.872	February 2015 (CU10)	http://support2.microsoft.com/kb/3031061
5.0.8308.857	December 2014 (CU9)	http://support2.microsoft.com/kb/3018158
5.0.8308.834	November 2014 (CU8)	http://support.microsoft.com/kb/3010032
5.0.8308.831	October 2014 (CU7)	http://support.microsoft.com/kb/3001616
5.0.8308.815	September 2014 (CU6)	http://support.microsoft.com/kb/2987510
5.0.8308.738	August 2014 (CU5)	http://support.microsoft.com/kb/2937310
5.0.8308.577	January 2014 (CU4)	http://support.microsoft.com/kb/2905048
5.0.8308.556	October 2013 (CU3)	http://support.microsoft.com/kb/2881684
5.0.8308.420	July 2013 (CU2)	http://support.microsoft.com/kb/2819565
5.0.8308.291	February 2013 (CU1)	http://support.microsoft.com/kb/2781547
5.0.8308.0	RTM	NA

Lync 2013 Client CU list 

Lync 2013 Windows Client Updates

The following table lists major client update packages with links directly to the download pages for both the client and any prerequisite components, which are only represented again when they themselves are updated.

Release Date		Version Number	KB Article	Client	MSO	MSORES	IDCRL	Lynchelp
October 2012	RTM	15.0.4420.1017
February 2013	CU1	15.0.4454.1509	KB2812461	x86 | x64		x86 | x64
March 2013		15.0.4481.1000	KB2760556	x86 | x64
July 2013	CU2	15.0.4517.1004	KB2817465	x86 | x64	x86 | x64	x86 | x64	x86 | x64
August 2013		15.0.4517.1504	KB2817621	x86 | x64
September 2013		15.0.4535.1002	KB2825630	x86 | x64
November 2013	CU3	15.0.4551.1005	KB2825630	x86 | x64	x86 | x64	x86 | x64	x86 | x64	x86 | x64
December 2013	CU4	15.0.4551.1007	KB2850057
February 2014	SP1	15.0.4569.1503	KB2817430	x86 | x64
March 2014		15.0.4569.1508	KB2863908	x86 | x64
April 2014		15.0.4605.1003	KB2880474	x86 | x64	x86 | x64
May 2014		15.0.4615.1001	KB2880980	x86 | x64
June 2014		15.0.4623.1000	KB2850074					x86 | x64
August 2014	CU5	15.0.4641.1000	KB2881070	x86 | x64	x86 | x64			x86 | x64
September 2014	CU5	15.0.4649.1000	KB2889860	x86 | x64	x86 | x64
October 2014		15.0.4659.1001	KB2889929	x86 | x64	x86 | x64
November 2014		15.0.4667.1000	KB2899507	x86 | x64
December 2014		15.0.4675.1000	KB2910927	x86 | x64	x86 | x64
February 2015		15.0.4693.1001	KB2920744	x86 | x64	x86 | x64
March 2015		15.0.4701.1000	KB2956174	x86 | x64
April 2015	SfB	15.0.4711.1002	KB2889923		x86 | x64			x86 | x64

Reference : http://blog.schertz.name/2014/08/updating-lync-2013/