Users and admins couldn't view or manage device group configurations through the Microsoft Defender portal.
- Status
- Wiederhergestellt
- Funktion
- Company or User Administration
- Region
- Nicht angegeben (alle Regionen)
- Beginn
- 19.10.2026, 20:35 Uhr
- Behoben
- 19.10.2026, 21:54 Uhr
- Dauer
- 1 Std. 19 Min.
Mehr Informationen
The device groups page in the Microsoft Defender portal wasn't loading for affected users and admins. Core security operations such as detection, alerting, and incident response weren't affected.
Betroffen
Users and admins who attempted to view or manage device group configurations through the Microsoft Defender portal may have been affected.
Ursache
A code issue in the device groups page was causing a component in the page rendering process to fail to handle the response correctly and was resulting in the page to crash.
Next steps:
- We're investigating the code issue to pinpoint why it wasn't caught during the testing and validation phase so that we can prevent impact to viewing or managing device group configurations through the Microsoft Defender portal in the future.
This is the final update for the event.
Abschluss
Our investigation has further determined it was specifically a code issue that was occurring within the device groups page and caused a component in the page rendering process to fail to handle the response correctly and resulted in the page to crash. We've developed and deployed a fix to remediate the impact and confirmed with some affected users that the issue is resolved.
Verlauf
Alle Updates von Microsoft zu dieser Meldung, das neuste zuoberst.
- 19.10.2026, 22:03 Uhr
Our investigation has further determined it was specifically a code issue that was occurring within the device groups page and caused a component in the page rendering process to fail to handle the response correctly and resulted in the page to crash. We've developed and deployed a fix to remediate the impact and confirmed with some affected users that the issue is resolved.
- 19.10.2026, 21:14 Uhr
We've identified that an issue in the device groups page is causing a component in the page rendering process to fail to handle the response correctly and is resulting in the page to crash. We're working on developing a solution that remediates the impact.
- 19.10.2026, 20:48 Uhr
We're investigating a potential issue with Microsoft Defender portal and checking for impact to your organization. We'll provide an update within 30 minutes.
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