The Benefits of Office Communications Online
Office Communications Online gives users the flexibility to collaborate quickly from within Microsoft Office. Here are just some of the benefits of using this great tool:

Instant messaging with text based chat using Microsoft Office Communicator 2007 client
Seamless presence awareness enabling users to check another user’s availability on the network
Presence information shared across Microsoft Office applications, including Outlook and SharePoint sites
Users can connect directly to the service over the Internet without RAS or VPN connections