What should you configure in the Exchange admin center …

DRAG DROP
You need to configure a distribution group named CustomerService that has the following configurations:
A user named CSManager must be the only user allowed to add members to CustomerService.
All email messages sent to CustomerService must be approved by CSManager.
External users must be allowed to send email messages to CustomerService.
You configure CSManager as the group owner.
What should you configure in the Exchange admin center for each requirement? To answer, drag the
appropriate configurations to the correct requirements. Each configuration may be used once, more than once,
or not at all. You may need to drag the split bar, between panes or scroll to view content.
Select and Place:

Answer:

Explanation:
http://msexchangeguru.com/2015/10/19/groups/