This has been a pet peeve of mine, the fact that, even in an organisation paying for Google Apps, you were required to enable Google+ to use Hangout. The issue

This has been a pet peeve of mine, the fact that, even in an organisation paying for Google Apps, you were required to enable Google+ to use Hangout. The issue is that Google+ leaks information: your profile picture and full name get returned from google searches, even when all privacy settings are turned on. If you are in a position where security and privacy are somewhat important (even if it's only to yourself), your only resort is to not use Google+ and by extension not be able to use Hangout, which becomes an issue when other people in the organisation need to communicate with you. Fortunately, https://appear.in https://appear.in works great (even in China, unlike Hangout) and there's no extra software to install.