Attendees change event office 365 outlook add-in

Question

I want to capture the change in attendees list of an appointment item inside my office 365 outlook addin. Whenever there is an attendee added / removed, I want to run a function inside my addin.

Here is one add-in that does it simple and nice. But I'm not able to find how to capture the change.

Answer 1

There are currently no events that you can hook into within an Appointment or Message object from the Mailbox API that can give you access to real-time changes. In fact, I believe this FindTime add-in is using features that currently aren't publicly available from either the Office Add-ins framework, the JavaScript API for Office or the Mailbox API.

Note though their task pane is activated via a ribbon button/add-in command . My guess is that FindTime is using the Outlook Notifications REST API to get updates as the meeting recipients are updated by the user. However, that API is currently in preview mode and I don't think you can use this yet for a production solution. Hope this helps!