Helping a company that is using Google Apps to improve its security between different departments, They want to restrict using Google hangouts in Google apps across different organizations on the same domain.
I tried easily at first to go through the Administrative settings and there was only disabling the hangouts in organizations. Same as written here
Then I tried to go through the Hangouts APIs which had nothing to do with restrictions so I went through the Admin Settings APIs, Yet could not find anything helpful.
My thoughts are either I can do such thing through some APIs - Right or wrong? - or somehow I can find some work around in building different hierarchy for the organizations.
Straight forward question, How can I restrict chatting and video hangouts between people in different organizations on Google Apps?