Information
Step by step on making Google Appointments modifiable by all Parties.
 
Environment
 
Process
	- Open Google Calendar.
 
	- Double Click on requested time and day.
 
	- Under Guest Permissions check the box next to Modify event.
 
	- Add guests to invitation.
 
	- Fill out the rest of appointment form and send.
 
The receiving party will now have access to modify the event and add their own notes. 
Note: If both parties are trying to edit the event at the same time only one modification will be saved.