Forum Discussion
Undelivered message expanded
Hello, I have a user who receives most mail just fine. But some senders never get a message deliverd to said user. Note, this is a normal user mailbox, it is NOT a group, however, the message tr...
I get what you're saying, but I also see what's on that screenshot and when there is an Expand event, usually a group is involved. Check the async message trace, it might reveal some additional details. And you can always open a support case and have this properly investigated.
I realize this is old.
We're having the exact same issue.
An email was sent to an internal user from an external user. The internal user did not receive the message. Search results show the message was expanded to a group. The group name is the internal users' email address. Their primary email address. There is NO group remotely similar to the email address that Office 365 says the message was originally sent to.
