MS Graph API - Patching Group Event Description does not send update to Attendees

Question

I am updating a group calendar event using Graph API.

PATCH https://graph.microsoft.com/v1.0/groups/{group-id}/events/{event-id}

• When I update the start or end date the update is correctly send to all attendees.
• When I only update the description of the event, the update is not sent to the attendees.
• The organizer (a group) gets the update in his inbox.
• The attendee (also an O365 group) does not get the update in his inbox.
• When I update the location, the update also gets send to all attendees.

What is the issue here?

My current workaround is, to generate a random number which I pass as location - as fortunately, I don't need the location field in the event. But I might need it in the future and thats the most stupid workaround ever.

Answer 1

Summarize the comment here so that the question can be treated as answered.

You are right. The update of body/content won't be sent to the O365 group attendee.

Attendee who is a user or shared mailbox will receive the update of body/content.

However, as this requirement is reasonable, you could post your idea in Microsoft Graph User Voice.