Office 365 Calendar Event "IsCancelled" will not update

Question

I'm not able to get IsCancelled to update on an event, but I can update seemingly everything else, and I get no error when I try. I event tried ResponseRequested which is also a boolean datatype.

It states here that the value IS writable: https://msdn.microsoft.com/office/office365/APi/complex-types-for-mail-contacts-calendar#EventResource

url: https://outlook.office365.com/api/v1.0/me/events/EVENTID

body:

{
    "Subject": "Test",
    "IsCancelled": true,
    "ResponseRequested": true,
    "ShowAs": "Free"
}

request type: PATCH

response code: 200

===== start response body =====

{  
   "@odata.context":"https://outlook.office365.com/api/v1.0/$metadata#Me/Events/$entity",
       "@odata.id":"https://outlook.office365.com/api/v1.0/Users('EMAILREMOVED')/Events('EVENTIDREMOVED')",
   "@odata.etag":"W/\"REMOVED",
   "Id":"EVENTIDREMOVED",
   "ChangeKey":"REMOVED",
   "Categories":[  

   ],
   "DateTimeCreated":"2015-02-05T20:16:58.2868803Z",
   "DateTimeLastModified":"2015-02-05T20:30:05.7761882Z",
   "Subject":"Test",
   "BodyPreview":"Event Details: Invitee: NAMEREMOVED Invitee Email: EMAILREMOVED Note: Should you need to cancel the event, COMPANYNAMEREMOVED recommends you use the event cancellation feature in COMPANYNAMEREMOVED.",
   "Body":{  
      "ContentType":"HTML",
      "Content":"<html>\r\n<head>\r\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\">\r\n</head>\r\n<body>\r\nEvent Details: Invitee: NAMEREMOVED Invitee Email: EMAILREMOVED Note: Should you need to cancel the event, COMPANYNAMEREMOVED recommends you use the event cancellation feature in COMPANYNAMEREMOVED.\r\n</body>\r\n</html>\r\n"
   },
   "Importance":"Normal",
   "HasAttachments":false,
   "Start":"2015-02-06T21:30:00Z",
   "End":"2015-02-06T21:45:00Z",
   "Location":{  
      "DisplayName":""
   },
   "ShowAs":"Free",
   "IsAllDay":false,
   "IsCancelled":false,
   "IsOrganizer":true,
   "ResponseRequested":true,
   "Type":"SingleInstance",
   "SeriesMasterId":null,
   "Attendees":[  
      {  
         "EmailAddress":{  
            "Address":"EMAILREMOVED",
            "Name":"NAMEREMOVED"
         },
         "Status":{  
            "Response":"None",
            "Time":"0001-01-01T00:00:00Z"
         },
         "Type":"Required"
      },
      {  
         "EmailAddress":{  
            "Address":"EMAILREMOVED",
            "Name":"NAMEREMOVED"
         },
         "Status":{  
            "Response":"None",
            "Time":"0001-01-01T00:00:00Z"
         },
         "Type":"Required"
      }
   ],
   "Recurrence":null,
   "Organizer":{  
      "EmailAddress":{  
         "Address":"EMAILREMOVED",
         "Name":"NAMEREMOVED"
      }
   }
}

===== end response body =====

Jason Johnston Jason Johnston · Accepted Answer · 2015-02-06T15:41:51

That's an error in the documentation. You can't update that property directly. To cancel an event you just delete it. The server will send all the needed cancellations.

Office 365 Calendar Event "IsCancelled" will not update

1 Answers