To remove an appointment from a calendar within the CRM, log into ESP and click on the CRM tab. Then, click on the Appointments option from the blue toolbar.

Then, take the following steps:

1. Click on the appointment you would like to remove.
   
2. Click on the Delete Appointment link at the bottom.
   
3. A notification will appear asking you to confirm the deletion. Click on OK.
   

The appointment will now be removed from the calendar.