Forum Discussion
Duplicate Calendar Invites Sent
- 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
We spent some time digging into the message trace logs further and noticed that the duplicates meeting invites that were being sent were "From IP: 13.110.6.8". That's not one of our IP addresses so a quick Google search indicated that it's a Salesforce IP address. We do have Salesforce and are using the Lightning to Office 365 API integration to provide syncing of Contacts and Calendar events. It seems like something changed on the Salesforce side so every time that sync occurs Salesforces sends out a new meeting invite to all the recipients. We're now working with Salesforce on what might be causing that.
Thanks everyone for your ideas!
I have the same issue and we think its related to Salesforce.
How did Salesforce end up resolving this for you?