If you've activated Google+ premium features for your organization, you can control whether your users' posts can be shared outside your organization by default. If a post disallows external sharing, anyone in your organization who received it can't share it with people outside your organization.
Note that although you can set a default sharing restriction, users can override this restriction for individual posts.
To set a default sharing restriction:
Sign in to the Google Admin console.
- Do one of the following:
- Choose one of the following:
- Unrestricted, meaning users can share posts with anyone.
- Restricted, meaning users can share posts only with members of your organization.
- Click Save changes.