For a quick glance here is a video - Client Leave Notification
Under the client biography, you will see a new option of Notification Supervisor.
Click on Notification Supervisor box and you will get a drop-down to choose the supervisor name/names to whom you want them to receive the leave notifications of the client to. You can choose multiple supervisors as shown below.
Now when the client will add a leave from their MPM portal.
Client's MPM portal
The supervisor can view the applied leave notification.
Supervisor's MPM portal
Notification of leave will have the following information.
1. Client name
2. Date of applied leave
3. Number of days of applied leave