Update Event needs the option to send only to added or deleted attendees
Update Event should include a Boolean to enable an option to 'send notifications to added or deleted attendees only' that will stop notifications going out to all meeting attendees when the only property that has been modified is attendees. This is causing an issue where people are getting dozens of unnecessary notifications when a meeting owner adds or removes attendees using the API or via a connector (ex. Flow).
In MS-Graph, when an event is updated to add or delete attendees the service logic itself sends it only to modified attendees.