For a quick glance here is a video - Add/Edit/Delete Appointments Permission
We have added the below new permissions for Adding/Editing/Deleting the Appts separately for billable and non-billable appts.
Note: Make sure to log out and log back into the MPM system after making changes in the permissions.
1. When you disable the permission "Allow To Create-Edit Billable Appointment In Calendar And Timeline View" for a group they would not be able to create or edit the billable appts from the Calendar And Timeline View pages.
While adding new appt
While viewing a created appt
Same would be for the non-billable appts by using the "Allow To Create-Edit Non-Billable Appointment In Calendar And Timeline View" permission.
2. When you disable the permission "Allow To Delete Billable Appointment In Calendar And Timeline View" for a group they would not be able to delete the billable appts from the Calendar And Timeline View pages.
Same would be for the non-billable appts by using the "Allow To Delete Non-Billable Appointment In Calendar And Timeline View" permission.