Add users and Google Groups to domain-restricted Google+ Communities
This feature is off by default. As a G Suite admin, you can turn it on for certain users, turn it on for certain organizational units (OUs), or turn it on for everyone in your domain.
To enable this setting for select users, open the Admin console and go to Admin Roles. After selecting the appropriate user role, click “Privileges” and scroll to "Google+,” where you can then configure the “Batch-add user groups to communities" privilege for that role.
If you’d like to enable this setting for an OU or everyone in your domain, in the Admin console go to Apps > G Suite > Google+ > Advanced Settings. Here, check the "Adding users directly" checkbox.
Please note: This feature will only be supported on domain-restricted communities. Additionally, users, groups, and group members that aren't part of the same domain as the community and users that have been banned from the community won't be added.
Check out the Help Center for more information on adding Google Groups to Google+ Communities.
Launching to both Rapid Release and Scheduled Release
Available to all G Suite editions
Full rollout (1–3 days for feature visibility)
Admins and all end users
Admin action suggested/FYI