To allow another user to supervise a users outbound email, you will need to create a new policy under “Supervision”
Start by opening the “Security” center from the Microsoft Admin Center
Click “Supervision” and “Create”
Name your policy and click next
Add the users or groups. You have the option to select teams chats also. Untick if not required and click next
Select Inbound / Outbound / Internal to review
Select the % to review
Add the reviewers (Supervisors)
Review and Click Finish
