Outage in SEDNA

Microsoft Incident - Users may experience delays sending and receiving email messages

Resolved Minor
August 29, 2025 - Started about 2 months ago - Lasted about 3 hours
Official incident page

Incident Report

As per Microsoft: ID: EX1144276 Issue type: Incident Status: Service Degradation Impacted services: Exchange Online Details: Title: Users may experience delays sending and receiving email messages User impact: Users may experience delays sending and receiving email messages. Current status: We're reviewing service monitoring telemetry to isolate the source of the issue and establish a fix. Scope of impact: Some users who are located in Europe attempting to send or receive Exchange Online email messages may be impacted. Next update by: Friday, August 29, 2025, at 2:30 PM UTC

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Latest Updates ( sorted recent to last )
RESOLVED about 2 months ago - at 08/29/2025 04:13PM

This incident has now been resolved

INVESTIGATING about 2 months ago - at 08/29/2025 01:38PM

Aug 29, 2025, 4:38 PM GMT+2
The new throttling rule has successfully been deployed. We’ve received confirmation from some of the previously affected users that they can now send and receive email. Additionally, our telemetry shows that the new throttling rule is having the desired effect and providing relief.

Next update by:
Friday, August 29, 2025 at 6:00 PM GMT+2

INVESTIGATING about 2 months ago - at 08/29/2025 01:36PM

As per Microsoft:

ID: EX1144276
Issue type: Incident

Status:
Service Degradation

Impacted services:
Exchange Online

Details:
Title: Users may experience delays sending and receiving email messages

User impact:
Users may experience delays sending and receiving email messages.

Current status:
We're reviewing service monitoring telemetry to isolate the source of the issue and establish a fix.

Scope of impact:
Some users who are located in Europe attempting to send or receive Exchange Online email messages may be impacted.

Next update by: Friday, August 29, 2025, at 2:30 PM UTC

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