Contact people based on their availability, and then click to communicate with them in the best way: by e-mail, Voice-over Internet Protocol (VoIP), instant messaging, or audio/video/Web conferencing. Access all communication with a single sign on and single inbox.
Connect from within Microsoft Office Outlook, Microsoft Office, and other applications you use every day.
Communicate securely while working away from your desk, on the road, or at home with a single, familiar client for the personal computer (PC), Web, and smart devices.
Bring people together with audio, video, and Web conferencing to improve team collaboration and to reduce the monetary and environmental costs of travel.
Visit
http://www.microsoft.com/uc/en/us/default.aspx for more