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Jake Smith's avatar
Jake Smith
Copper Contributor
Dec 17, 2018
Solved

Duplicate Calendar Invites Sent

Beginning 12/13/18 we got a report from one of our end users that Calendar invite emails were being sent multiple times to the recipients (both internal and external).  The recipient would report re...
  • Thuyavan Ganesan's avatar
    Dec 17, 2018
    Hi,

    Could you run a message trace (https://docs.microsoft.com/en-us/exchange/monitoring/trace-an-email-message/run-a-message-trace-and-view-results) to trace these duplicate emails and in the message trace results box, double click one duplicate email and then share with us the detailed delivery status screenshot.
    Please share the mail header of this duplicate email’s from the recipients/attendees’ side.

    There is another thing your admin can do is to check the transport rules in > exchange admin center> mail flow > rules, check whether there are related transport rules to send these duplicate emails.
    Let me now how it goes

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