Hi @Ofek Kochavi
I recommend that you only include the attendees
property in the request body. This way it will only send notifications to newly added attendees.
PATCH https://graph.microsoft.com/v1.0/me/events/{event_id}
{
"attendees": [
attendee 1,
attendee 2,
attendee 3,
......
new attendee 1,
new attendee 2,
......
]
}
Hope this helps.
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