This document provides an overview of Microsoft Lync Online, including its key features and how to customize settings. Lync Online allows users to connect with others through instant messaging, see presence status in Office apps, hold online meetings with audio/video/screen sharing, and schedule online presentations. It also integrates with Outlook, SharePoint, and Windows Live. The document reviews features like contacts, activity feeds, conversations, conferencing, and public instant messaging. It concludes by explaining how to access and customize Lync Online options to control settings like alerts, personal information, and file saving preferences.