Outage Details

Microsoft Advisory: Some users may encounter Non-Delivery Report (NDR) failures when sending or receiving email messages

Type: Advisory

Issue Status: Initial Posting

Outage Date: - Now

Services Affected: Email

Campus Affected: All UNB Campuses

Original Details:

Some users may encounter NDR failures when sending or receiving email messages in Exchange Online.

Users may receive a Non-Delivery Report (NDR) containing an error stating "554 5.6.0 Corrupt message content".

Additionally, users may intermittently receive calendar invite emails as a plain text message containing winmail.dat attachments.

Microsoft is working on the a resolution to the issue, the next update expected is Friday, March 14, 2025 at 5:30 PM ADT