Starting today, Google+ Premium Features will be enabled for any new customers that enable the Google+ service moving forward. In the next few weeks, we will be enabling Premium Features for existing customers as well. This change will give Google Apps admins access to a number of great business-specific features, making it even easier for your users to share and collaborate with each other, while ensuring that confidential information stays inside your organization.
Rapid release and Scheduled release
For more information:
Reference by : http://www.google.com/