Outage in SEDNA

Microsoft Outage

Resolved Major

January 23, 2026 - Started 23 days ago - Lasted about 3 hours
Official incident page

Incident Report

Microsoft Outage: Degraded Service Microsoft is currently experiencing degraded service functionality. As a result, recipients using Microsoft mailboxes may not receive emails, and messages sent from Sedna may result in NDRs. Updates on Microsoft’s Service Health Status can be found here: https://status.cloud.microsoft/m365

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Latest Updates ( sorted recent to last )

RESOLVED 23 days ago - at 01/23/2026 07:01AM

This incident has been resolved.

INVESTIGATING 23 days ago - at 01/23/2026 04:37AM

We are continuing to investigate this issue.

INVESTIGATING 23 days ago - at 01/23/2026 04:36AM

Microsoft Outage: Degraded Service

Microsoft is currently experiencing degraded service functionality. As a result, recipients using Microsoft mailboxes may not receive emails, and messages sent from Sedna may result in NDRs.

Updates on Microsoft’s Service Health Status can be found here: https://status.cloud.microsoft/m365

Latest SEDNA outages

Mail Ingress & Egress Outage: Some Customers in EU Clusters unable to Send and Receive Mail - 3 days ago

Mail Ingress & Egress Outage: Customers in EU Clusters unable to Send and Receive Mail - about 1 month ago

Platform performance issues: Customers experiencing autotagging slowness in Virginia1 and default clusters - 4 months ago

Mail Creation and Delivery Issues on Dublin2 cluster - 4 months ago

Mail Flow Issue related to AWS outage - US-EAST-1 - 4 months ago

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