Today, we had an individual reply to an email that wasn't sent to them. The sender checked and said he didn't send that user the email message. When searching the message tracking logs, I can find where the individual replied to the unexpected email but I cannot find where the sender sent the message to that particular recipient. I can find where he sent it to his intended recipients with no problem. I have used get-messagetrackinglogs quite frequently and have pretty much always been able to find what I'm looking for but this one has me baffled.
I've narrowed the search to just the hours around when the email was sent accounting for UTC. I've narrowed by subject, recipient, and various eventID's. Nothing turns up the original email and when and who sent it to them. I've also checked for every email message sent by the original sender and every email message received by the individual from before the original email was sent to the present time. Nothing but the response to the original message is found. Nothing shows up indicating the email was ever sent to the unexpected recipient by the sender or received from the sender by the unexpected recipient. I'm at a loss here.
Has anyone ever experienced exchange "accidentally" dropping an email in a mailbox that wasn't a recipient of that particular email? I think Microsoft would make absolutely sure that could never happen because lawsuits would be bad if people received information in an email that they weren't supposed have access to.
HALP!!