In November we announced a suite of new admin features in Hangouts. Today, we are announcing a few more features that make Hangouts work better for businesses, schools and governments.
Administrator setting to warn users when chatting out of the domain
Admins can now enable a setting that will show users a warning that they are chatting with someone outside of their own domain. When warnings are enabled for users chatting outside of their domain, group chat conversations will be split when the first person from outside the domain is added to the discussion. This will prevent external users from seeing previous internal discussions.
Note that these features are only available in the desktop UI. We are working on adding them to the Hangouts mobile apps soon.
Google Apps for Business and Education
For more information:
Reference by : http://www.google.com/