Recently Google announced the roll-out of Hangouts video calls for up to 15 participants to everyone on Google Apps. This applies to people with and without access to Google+, with either Google Talk or Google Hangouts chat enabled. Starting today, Google Calendar will automatically add video call links to new Calendar events for all Google Apps for Business and Education customers.
Asannounced earlier this year, administrators can disable this functionality for specific organizational units.
We plan to provide similar functionality to Google Apps for Government soon.
Release track: Rapid release, with Scheduled release coming in two weeks