[English]Zum gestrigen Abend des 8. Oktober 2025 hat es eine Störung bei den Microsoft 365-Diensten gegeben. Dies führte dazu, dass Nutzer Probleme beim Zugriff auf Funktionen von Microsoft Teams und Exchange Online hatten. Da die Störung in den späten Abendstunden erfolgte, dürften Nutzer in Europa weniger betroffen gewesen sein. Nach knapp zwei Stunden ist es Microsoft gelungen, die Ursache dieser Störung zu beseitigen.
Ich bin gestern Abend (8. Oktober 2025) über nachfolgenden Tweet des von Microsoft betriebenen Kanals @MSFT365Status auf den ersten Hinweis gestoßen.
Muss in Europa gegen ca. 17:00 Uhr gewesen sein. Gut zwei Stunden später gab es dann Entwarnung. Die Störung, die den Zugriff auf die Systeme verhinderte, war durch Umkonfigurierung behoben. Microsoft hat das Ganze in der Meldung MO1168102 dokumentiert – die Kollegen von Bleeping Computer haben hier noch was dazu geschrieben.
MO1168102 – Some users may be unable to access the admin center or leverage Microsoft Entra to access other Microsoft 365 services
Status: serviceRestored
Start Time: Wed Oct 8 12:06:00 2025
End Time: Wed Oct 8 13:59:00 2025
Service: Microsoft 365 suite
Feature Group: Portal
Classification: incident
Last Updated: Wed Oct 8 15:13:01 2025
Root Cause: N/A
Next Update: N/A
collapse section Details
Time: Wed Oct 8 14:58:49 2025
Description: Title: Some users may be unable to access the admin center or leverage Microsoft Entra to access other Microsoft 365 services
User impact: Users may have been unable to access the Microsoft 365 admin center or Microsoft 365 services using Microsoft Entra.
More info: Some users attempting to access other Microsoft 365 services, including but not limited to Microsoft Teams and Exchange Online, may have been unable to authenticate and access the services. Additionally, users might not have received Multi-Factor Authentication (MFA) messages when attempting to sign in. Affected users may have encountered an error stating, "We are sorry, something went wrong. Please try refreshing the page in a few minutes. If the problem persists, please visit status.cloud.microsoft for updates regarding known issues."
Final status: Our analysis identified a portion of directory operations infrastructure which became imbalanced during a period of high traffic volume and caused authorization failures associated with impact. We've successfully rebalanced traffic across the affected infrastructure and confirmed after a period of monitoring that the impact is no longer occurring.
Scope of impact: A portion of users attempting to access the Microsoft 365 services outlined in the 'User impact' and 'More info' sections of this communication may have been impacted.
Preliminary root cause: A portion of directory operations infrastructure became imbalanced during a period of high traffic volume, which caused failures associated with impact.
Start time: Wednesday, October 8, 2025, at 4:06 PM UTC
End time: Wednesday, October 8, 2025, at 5:59 PM UTC
Next steps: – We're analyzing volume trends and traffic management processes on the affected directory operations infrastructure to identify necessary refinements and increase resilience in the event of future instances of high traffic volume.
We'll provide a preliminary Post-Incident Report within two business days and a final Post-Incident Report within five business days.
Time: Wed Oct 8 14:25:52 2025
Description: Current status: We're observing recovery in response to our efforts to rebalance traffic across the affected directory infrastructure. We'll continue to closely monitor the environment to ensure withstanding remediation.
This quick update is designed to give the latest information on this issue.
Time: Wed Oct 8 14:06:13 2025
Description: Title: Users may be unable to access the admin center or leverage Microsoft Entra to access other Microsoft 365 services
User impact: Users may be unable to access the admin center or leverage Microsoft Entra to access other Microsoft 365 services.
More info: Some users attempting to access other Microsoft 365 services, including but not limited to Microsoft Teams and Exchange Online, may be unable to authenticate and access the services. Additionally, users may not receive Multi-Factor Authentication (MFA) messages when attempting to sign in.
Affected users may encounter an error stating "We are sorry, something went wrong. Please try refreshing the page in a few minutes. If the problem persists, please visit status.cloud.microsoft for updates regarding known issues."
Current status: Our analysis of diagnostic data associated with the affected directory operations infrastructure is ongoing as we seek to understand the root cause of this issue.
In the meantime, we're rebalancing traffic across the affected infrastructure as a near-term mitigation action to provide relief to affected users.
Scope of impact: A portion of users attempting to access the Microsoft 365 services outlined in the 'User impact' and 'More info' sections of this communication may be impacted.
Start time: Wednesday, October 8, 2025, at 4:06 PM UTC
Next update by: Wednesday, October 8, 2025, at 8:00 PM UTC
Time: Wed Oct 8 13:36:05 2025
Description: Current status: We're rebalancing an affected section of dependent service
infrastructure as a potential mitigation action.
This quick update is designed to give the latest information on this issue.
Time: Wed Oct 8 13:26:03 2025
Description: Current status: We've identified a potential directory operations issue within a portion of dependent service infrastructure. We're reviewing the diagnostics to determine our next steps.
This quick update is designed to give the latest information on this issue.
Time: Wed Oct 8 13:11:28 2025
Description: Title: Users may be unable to access the admin center or leverage Microsoft Entra to access other Microsoft 365 services
User impact: Users may be unable to access the admin center or leverage Microsoft Entra to access other Microsoft 365 services.
More info: Additionally, users may be unable to receive Multi-Factor Authentication (MFA) messages when attempting to sign in.
Current status: We're investigating reports of an issue in which users may be unable to access the Microsoft 365 admin center or leverage Microsoft Entra to access other Microsoft 365 services. We're reviewing dependent service pathways to identify our initial investigating actions.
Scope of impact: Any users attempting to access the Microsoft 365 admin center or leverage Microsoft Entra to access other Microsoft 365 services may be impacted.
Next update by: Wednesday, October 8, 2025, at 6:00 PM UTC
Time: Wed Oct 8 12:51:46 2025
Description: Title: Investigating user reports of issues with Microsoft 365 services
User impact: We don't have details on impact yet. We're seeing an increase in user reported issues above our alerting threshold.
Current status: We are reviewing service telemetry and available information to determine if there is an issue happening and we'll update this message shortly with our latest findings.
This communication serves as a preliminary notification about a potential issue affecting your service.
MVP: 2013 – 2016
Bei uns grade wieder massive Störungen bei allen Cloud Diensten von MS
Hier auch, die Portale sind extrem langsam oder gar nicht zu erreichen!
Dasselbe hier. Die Admin Center sind aufgrund eines Zertifikatsfehlers nicht aufrufbar.
Same here:
– Admin Center ewig langsam
– Lizenz Zubuchung über CSP Partner nicht möglich
– ein paar Kunden haben im Outlook Zertifkatswarnungen (irgendwie mit einer azure domain) erhalten.
Es gibt jetzt unter der ID MO1168102 (eine öffentliche URL habe ich nicht gefunden) einen – wie Microsoft es nennt – Vorfallnachsorgebericht, also Post-Incident Report.
Root Cause
One Entra ID fault domain was impacted by a latent code bug. Certain request types took longer to process due to the bug, resulting in timeouts, request failures, and amplification. The amplified traffic from retries further contributed to the outage.