Office Communications Server (OCS) integrates phone calls, voice mail, and conferencing capability with the work you do on your computer, including documents, instant messaging (chat), e-mail, and calendars. This means OCS gives you the power and flexibility to be completely productive from your desktop at anytime and anywhere by interacting with anyone in your OCS network.
With the rich presence capabilities in OCS, productivity increases as users can easily see their colleagues’ availability and contact information, and communicate with them using familiar Microsoft Office applications. What’s more, implementation can happen without overhauling your existing infrastructure.