Microsoft Graph
A Microsoft programmability model that exposes REST APIs and client libraries to access data on Microsoft 365 services.
13,684 questions
Graph Api Calendar
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Paolo Manago
0
Reputation points
Hello, I have created an application to synchronize outlook events with our calendar, however I see there is a problem. When I delete an event via outlook or via the delete call the system acts as a permanent delete. In fact trying to return the event list the event is no longer present and there is no event marked as isCancelled. I have tried the various calls, me/calendar/events,me/calendarview or me/calendarview/delta. But none returns me a list with the deleted events
Microsoft Graph
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Mark Dicks 540 Reputation points2025-06-12T10:12:01.4566667+00:00 Hi there Paolo Manago, this isn't an answer, more follow up questions to check potential issues.
- Are your permissions for the app correct?
Calendars.ReadorCalendars.ReadWrite - Log the full delta response JSON to check for any
@removedproperties. - Are you maintaining the delta token properly between calls?
A delta token is a marker returned by Microsoft Graph after a delta query. It tracks the state of data (like calendar events) at a point in time. You use it in your next delta query to get only the changes (adds, updates, deletes) since the last sync.
- Are your permissions for the app correct?
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Paolo Manago 0 Reputation points
2025-06-12T16:34:39.9+00:00 Hi Mark,
As permissions I set Calendars.ReadWrite. The delta calls I had used just to test, for daily calls I use calendarview directly. But at first isCancelled was being compiled.
But I see that the calls lately are having problems in general, connecting directly to https://developer.microsoft.com/en-us/graph/graph-explorer even with my private profile, enabling all permissions the call https://graph.microsoft.com/v1.0/me/calendars always returns me :
{
"error": {
"code": "ErrorInternalServerError",
"message": "An internal server error occurred. The operation failed."
}
}
Even changing users or creating a new one I see that the result does not change, and that me/calendar/events still does not show the deleted ones.
I say this is an anomaly since there are for deletion 2 endpoints, namely delete and permanentDelete which however currently do the same thing, namely permanentDelete
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