Microsoft 365 Suite under investigation

Update timeline

1. investigating Mar 18, 2026, 03:43 PM UTC

   A problem with the Microsoft 365 suite is under investigation. Reported by Brandon Young Submitted by Brandon Young Questions 402-472-3970 or [email protected]

2. investigating Mar 18, 2026, 03:55 PM UTC

   Microsoft has reported that they are seeing an increase in user reported issues but they don't have details on impact yet. NU ITS has received reports from users who are being prompted to log in repeatedly and others who are seeing an Access Denied message when attempting to access resources they have permissions for. Further updates will be posted here as additional information becomes available.

3. monitoring Mar 18, 2026, 05:08 PM UTC

   All issues appear to have subsided, and all systems are performing as expected. We're continuing to monitor for any reoccurring problems.

4. resolved Mar 18, 2026, 09:53 PM UTC

   All systems are operating normally. This issue is resolved.

5. postmortem Mar 18, 2026, 09:54 PM UTC

   Microsoft’s investigation confirmed that a portion of their networking infrastructure that was recently removed from active service had only reinstated a subset of that removed infrastructure to active service, which led to a load balancing issue when rerouting service traffic. They manually reinstated the entirety of the networking infrastructure slated for service load, and observed positive trends on the service health before later confirming that the service remains healthy and impact is remediated.