Microsoft Exchange Server is the industry leader in business e-mail messaging, calendaring, contact management, and software-powered voice mail. Exchange Server helps you achieve higher reliability and performance with features that simplify your administration, protect your communications, and delight your users by allowing them greater business mobility.
Microsoft Office Communications Server 2007 R2, a cornerstone of the Microsoft Unified Communications solution, provides presence, instant messaging, unified conferencing (audio, video, and Web), and enterprise voice for businesses around the world.
Microsoft Exchange Online is a hosted enterprise messaging solution based on Microsoft Exchange Server 2007. It improves e-mail security, allows users to access e-mail from anywhere, enhances operational efficiency, and provides 5GB of mailbox storage per standard license (configurable up to 25GB).
Microsoft Office Communications Online delivers robust instant messaging and presence functionality that enables real-time, person-to-person communication via text, voice, and video across an organization.
Microsoft Office Live Meeting allows users to connect with colleagues and engage customers through real-time meetings, training sessions, and events.
