How can I be notified in code via MS Graph, if a calendar event is declined

Question

How can I be notified in code via MS Graph, if a calendar event is declined

Julian Tucker 16

How can I be notified in code if a calendar event is declined?

Hi,

I've been trying to work out how to pick up calendar decline events in Outlook, using MS Graph.

What I have so far:

An API (Graph API Hook) that I can monitor in Azure
C# code to register myself for events and messages, pointing to the API in 1. above
Send myself an Outlook Calendar appointment
See that appointment arrive in my Graph API hook output window in Azure (1. above)
Use Graph Explorer to view data based on 'me' and an event id and / or a message id.
This data that comes back is only 'messages' when I decline from my Inbox I can't seem to marry anything up in the data that I obtain in step 5. to indicate that it is a declined event. For instance I need the uid and/or the iCalUId_v2 of the event to indicate that I have a specific type of event. How can I get that original event data from the messages received in 5. above? Really hoping someone can help, as I've spent quite a while on setting this test up so far, to no avail!!

1 answer

Your answer

Answer 1

Julian Tucker 16

OK, I'm editing my response here. I can see that I did not add 'deleted' to the list of events to subscribe to. I am now getting deleted and updated events on a decline.

So my next question is this is anyone is out there: How do I then get hold of the EXACT event that has been declined. I can see user and event ids in the response data, but on trying to obtain this info based on the id, I don't get the event that has been declined, just a whole bunch of events going backwards in time form now.

I'm kind of assuming that as it has been declined, it no longer exists. In which case, what's the point of an ID and is this possible, in any way? I'm hoping someone can advise.

Sourabh Gupta 800 Reputation points Microsoft External Staff

2024-02-24T16:23:25.1433333+00:00

Hi Julian Tucker,

You are correct why event cant be fetched by id is because the event no longer exists after it is being declined,

Why Id is being returned as part of the notification because that is standard graph practice to return Ids with delete notification, because lots of application are designed in a way where they store Ids in their own database and they have to delete those records based upon notifications. It might not be helpful in your case but in most other cases its helpful and required.

However, you can consider filing feature request for your use case at the link mentioned below. https://feedbackportal.microsoft.com/feedback/forum/ebe2edae-97d1-ec11-a7b5-0022481f3c80
Julian Tucker 16 Reputation points

2024-02-26T08:22:26.5933333+00:00

Thanks @Sourabh Gupta I think what I can do as soon as I receive the decline message in the hook, is check the deleted items folder (C# - MailFolders["DeletedItems"]). I can hopefully then identify if one of the last few deleted items is a deleted calendar event (specifically - that we sent out). So here's a question for you: On sending a calendar event to someone from our own website (by email), could I then obtain that Graph Calendar Event ID? I could as you say, maybe store the ID against the user and I would have what I need. I'm guessing in your scenario that a company would set up the calendar event directly into the Calendar using Graph, and they would have the ID that way maybe. That is something we could consider, but we send them out as an email Calendar Appointment at the moment. Thanks again.

Share via

How can I be notified in code via MS Graph, if a calendar event is declined

1 answer

Your answer