Office Communications Server 2007 R2 continues to deliver on the Microsoft promise to streamline communications for users, give IT organizations the flexibility and control they need to manage their communications infrastructure efficiently, and provide an extensible platform for communications-enabled business processes.

Microsoft Office Communications Server 2007 also powers presence, a key benefit of Microsoft unified communications that unites all the contact information stored in Active Directory with the ways people communicate.

With presence, you can see at-a-glance if someone is available and contact them with a click using instant messaging, a phone call or a video conference.