Users with an active Google+ profile can add a Google+ Hangout to calendar events. Invited guests can join the hangout by clicking on “Join hangout” on the event details page. These hangouts will respect any restrictions in the administrator control panel.
Release track:
Rapid
Editions included:
Google Apps for Business, Government and Education
For more information:
http://googleenterprise.blogspot.com/2012/08/bringing-google-to-work.html
http://support.google.com/calendar/bin/answer.py?hl=en&answer=2690797
