Forum Discussion
Message Trace details
Hi, this can quite often occur due to mailbox rules so I'd suggest that none are applied to the affected users mailbox first of all.
I've just checked message trace in the Security and Compliance Center myself and the seems to be no way to tell the difference between a standard email message and an email invitation. They look to continue the same trace information and simply say that the message was successfully delivered as shown below;
Hi, this can quite often occur due to mailbox rules so I'd suggest that none are applied to the affected users mailbox first of all.
I've just checked message trace in the Security and Compliance Center myself and the seems to be no way to tell the difference between a standard email message and an email invitation. They look to continue the same trace information and simply say that the message was successfully delivered as shown below;