Microsoft Exchange Online is a hosted messaging solution that delivers the capabilities of Microsoft Exchange Server as a cloud-based service. It gives users single sign-on access to email, calendar, contacts, and tasks from PCs, the web, and mobile devices. It integrates fully with Active Directory, enabling administrators to use group policies, as well as other administration tools, to manage Exchange Online features across their environment.
Microsoft Lync Online is a hosted communications service that connects people anytime and from virtually anywhere by delivering the collaboration capabilities of Lync Server 2013 as a cloud-based service. It gives users access to presence, instant messaging, audio and video calling, rich online meetings, and extensive web conferencing capabilities.
Microsoft SharePoint Online enables an organization to easily create and manage custom team-focused and project-focused sites for collaboration. In addition, it’s possible to deploy an organization-wide intranet portal used to disseminate information and news across the organization. For a quick overview of other Microsoft SharePoint Online products and technologies, see What is SharePoint?