If you are looking for a cumulative update for Lync 2013 servers you will not find any available since 6 December 2016.
I will find the download page KB2809243 with the following message:
“An issue was discovered in the Lync Server 2013 November 2016 Update (build 8308.974) that causes contact searches on mobile clients to return no results. Because of this issue, the November 2016 Update is no longer available for public download. The Skype for Business team is working on a fix that is scheduled to be delivered soon in a new update.“
Which complicates your Sysadmin life, since there were some the important fixes/updates:
- KB3204553 – Lync Server 2013 adds support for Skype for Business for Mac
- KB 3204552 – Skype for Business mobile clients don’t show telephone numbers for some users on contact card
- KB 3204547 – You can’t join a meeting from Safari or Firefox through a Lync Server 2013 Mac app
- KB 3204546 – (again this one) You can’t join a meeting from outside Skype for Business or Lync on iOS 10.0 and later versions
Update (13/12/2016): The cumulative update is available again for download. It has an updated published date, but no information that it replaces the one released two weeks ago.
Update (14/12/2016): Microsoft release KB3212869 identifying the November 2016 CU (8308.974) issue whose solution is to download and deploy this undocumented CU (8308.977)
I guess that if you ran it, will update any previous installed version… and one more ‘extra patching planning’ to perform.