I work for an IT company that manages quite a few Office365 accounts. I'm starting to get several of our clients contact me with the same error message. They are receiving emails saying
Delivery is delayed to these recipients or groups
sender address
email subject
This message hasn't been delivered yet. Delivery will continue to be attempted.
They sent the emails in question ~4-5 hours previous to receiving the delivery delayed email. Anyone else having this issue?
Thanks