Forum Discussion
Issue with Receiving Emails from External Organisations using Exchange Servers On-Premise
Dear Microsoft Community, We are currently encountering a critical issue where emails sent from external company using Exchange server On-Premise setup are not reaching our Exchange Online enviro...
If it has been NDR I can review.
Already started a Service Request Today at Exchange Server Online.
Seems to be NDR. No Message Tracing available under Mail Flow / Exchange Admin Center