This document outlines an agenda for a webinar about extending Microsoft Lync. It introduces Harbinger Systems, discusses Lync as an extensible platform, and highlights some key custom applications including enhanced presence, click to communicate, conversation translation, an expert finder, web chat, and interactive voice response. It also provides overviews of the Lync APIs and concludes with descriptions of 5 demos: the essence of presence, conversation translation, chatting with an expert, a visual IVR, and a contact center application.