As a G Suite administrator, you can control who can add users and groups to Google+ communities directly (without sending an invitation). You can allow all community owners and moderators to add users directly. Or, you can use the batch-add privilege to allow only specific admins to add users or groups directly.
To add or be added, the user must be in the domain or organization that has Google+ and Groups for Business turned on. You don't have to be a member of the group to add it to the community. For more information on adding Google Groups to communities, see Moderate a Community: Details about groups.
Allow all owners or moderators to add users directly
From the Admin console Home page, go to AppsG SuiteGoogle+.
- Click Advanced settings.
- Under Advanced settings, click Adding users directly.
- On the left, select an organizational unit or group. Otherwise, the setting applies to everyone.
- Check the allow box.
- Click Save. If you made changes to an organizational unit or group, you may have the option to Inherit/Override an organization or Unset a group.
Allow only admins with batch-add privilege to add users directly
You can create a custom admin role with the batch-add privilege. Then, apply that role to specific owners or moderators so they can batch-add users to communities.