GraphClient, C# unable to fetch Appointments created in Outlook.

Question

I am using GraphServiceClient v1.0. With OAuth token.
I have Calendars.ReadWrite, Calendars.ReadWrite.Shared, User.Read permissions.
I use Calendars.ReadWrite scope for this request.

I am able to create and get Events and Tasks(using default task list).

Where I am struggling is to get the Appointments created in Outlook.

All the events/tasks created programmatically can be retrieved, but not the outlook created Appointments. I tried with Events and CalendarView but both return same results.

Am I missing something, or need to hit a different end point?. Here is the code

       var graphClient = new GraphServiceClient(baseUrl,
           new DelegateAuthenticationProvider(async (requestMessage) =>
           {
               requestMessage.Headers.Authorization = new AuthenticationHeaderValue("bearer", token);
           })
        ));



           var queryOptions = new System.Collections.Generic.List<Microsoft.Graph.QueryOption>()
                {
                    new Microsoft.Graph.QueryOption("startDateTime", "2020-12-06T19:00:00-08:00"),
                    new Microsoft.Graph.QueryOption("endDateTime", "2020-12-07T19:00:00-08:00")
                };

                var calendarView = await graphClient.Me.CalendarView
                    .Request(queryOptions)
                    .GetAsync();

               var meetingEvents = await graphClient.Me.Events
                .Request()
                .GetAsync();

              var tasks = await graphClient.Me.Todo.Lists[taskListId].Tasks
                .Request().Top(20)
                .GetAsync();

            // And I am combining both the results (meetingEvents,  tasks) to obtain final list of entire tasks

Thanks in advance.

Answer 1

I tested the above Graph API call in Microsoft Graph Explorer and POSTMAN, which works. So i dont think its issue with Graph API call. Just to isolate the issue, I would suggest you to test the code individually for tasks and events to see if it helps.