Prevent Email Notifications
🔹 Option 1: Use "Is Regular Activity" = No (Advanced)
When creating the appointment programmatically (e.g., Power Automate, plugin, or API), set this field:
"isalldayevent" = false
"seriesid" = null
"ismapiprivate" = true
"instancetypecode" = 0
But more importantly:
Set "isregularactivity" = false
This often prevents syncing with Exchange (which triggers the email)
⚠️ This is not exposed in UI — used only via API or code.
🔹 Option 2: Uncheck "Send Email Invitation" (UI Approach)
When creating or editing an appointment manually, uncheck the "Send Email" option:
This option appears in the appointment form, usually as a checkbox if the integration with Exchange is enabled.
However, if you're logging past appointments, this box should be unchecked manually (or via form scripting).
Problem: It may still default to true or may not be available depending on your setup.
🔹 Option 3: Disable Tracking/Sync Temporarily
If you’re importing or creating appointments in bulk, disable tracking temporarily:
Go to Personal Settings > Email
Uncheck "Track appointments and meetings in Outlook"
Or, temporarily disable server-side synchronization
Use case: For bulk creation or migration of past appointments.
🔹 Option 4: Set Appointment Status to Completed Immediately
When creating a past appointment:
Set its Start/End time in the past
Set Status Reason = Completed
"scheduledstart": "2024-06-10T10:00:00Z",
"scheduledend": "2024-06-10T11:00:00Z",
"statecode": 1, // Completed
"statuscode": 3 // Completed
Appointments that are already completed do not trigger invitations.
