Lync 2013 follows the Fixed Lifecycle Policy.
This applies to the following editions: SDK, Standard
Support dates are shown in the Pacific Time Zone (PT) - Redmond, WA, USA.
|Listing||Start Date||Mainstream End Date||Extended End Date|
The Skype for Business 2015 Client release is an update to the Lync 2013 Client and will follow the same product lifecycle. The start date for Lync 2013 SDK is February 23, 2013.