So for example, you can only allow the entire organization to view members if you’ve already allowed anyone on the web or organization members to see the group. Some permissions affect which options are available for other permissions. (For example, select members while excluding managers.) If you previously set an exclusion, that exclusion remains until you change the permission. In the previous version of Groups, you could exclude a subset of group members. If your group has users outside your organization and you select Entire organization for a permission, the external group members don’t receive the permission.

The default group roles (owners, managers, or members).Depending on how your administrator has set up your organization’s group sharing settings, an owner or manager can assign each permission to different sets of users:

Using permission settings, a group owner or manager can determine who can view, post, and moderate content and manage members in Google Groups. If Google Groups isn't available in your work or school account, ask your administrator to turn on Groups for Business.

Manage google drive users