All HL appointments will still push to the linked Google calendar no matter what the sync option is.
The behaviour for two-way sync and disable trigger would pull the guests in the Google events and add them to Highlevel.
Smart sync would pull the guests in the Google events and add them to Highlevel if we found that they are already a lead with the same email in HighLevel.
Calendar Sync Options:
All events from Google calendar will be shown as grey. It will not add whoever is invited in the Google event to HighLevel. But will still sync the Appointments from HL to the Google calendar and block the timeslot pulled from Google.
All events from google calendar will be colored and will talk to each other. HighLevel will find who is invited in the Google event, create a contact record for them, and fire off any triggers associated with the calendar.
When an event is created in Google calendar but the contacts associated with the event were not found to be already existing in HighLevel as contacts, HighLevel will not add them as contacts but will block the time off in your HighLevel calendar (event color will be gray).
Alternatively, when an event is created in Google calendar and the contacts associated with the event were found as existing contacts in HighLevel, HighLevel will color code the event and fire off any triggers associated with the calendar.
All Google Calendar event contacts will be pulled into HighLevel as new contacts, but no triggers associated with the HighLevel calendar will fire.