Assume I have an event (that has attachments) attached to my email, then I will use the api call provided here and get the event details, but I see that "Id" property is missing in the response. The same happens for messages as attachments. My problem is if I do not have the eventId or messageId, then I am not able to get their attachments.
Please see the below picture which shows the response from the provided api call here.
As mentioned here, we can use the following api call:
GET https://outlook.office.com/api/beta/me/messages/[message-id]?$expand=Attachments($expand=Microsoft.OutlookServices.ItemAttachment/Item($expand=Microsoft.OutlookServices.Event/Attachments))