Microsoft 365: Teams and Outlook was down again (10/07/2020)

[German]On October 7, 2020, Microsoft 365 experienced another disruption to Azure Cloud services. Users are having problems accessing Microsoft Teams or Outlook 365 and this is now the second malfunction since the end of September and on October 1, 2020.


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On Twitter the following Microsoft 365 status message can be found. Microsoft is investigating messages from users reporting problems with Microsoft 365 services. Bleeping Computer and The Register has also addressed it.

Microsoft 365-Störung

Users may notice impact on Microsoft Teams, Outlook, SharePoint Online, OneDrive for Business.  See theOutlook.com Web page for details:

Microsoft 365 Service health status

The following services have been recovered, the remaining updates are related to the isolated admin center impact: SharePoint Online/OneDrive for Business – Services are healthy Microsoft Teams – Services are healthy Microsoft Forms – Services are healthy Microsoft Threat Protection – Services are healthy Microsoft Intune – Services are healthy Exchange Online – Services are healthy Outlook.com – Services are healthy Title: Admins may experience delays or be unable to access the admin center User Impact: Admins may be experiencing delays or be unable to access the admin center. Current status: We’re taking additional mitigation actions for the admin center impact related to MO223756. We anticipate that the service will be recovered by Wednesday, October 7, 2020, at 11:30 PM UTC. Scope of impact: Admins in the North America region may be experiencing delays or be unable to access the admin center. Start time: Wednesday, October 7, 2020, at 6:10 PM UTC Next update by: Thursday, October 8, 2020, at 12:30 AM UTC

In the meantime, Microsoft has found the cause and announced the elimination of the worldwide disruption in further tweets.

We’ve identified a recent change that may have resulted in impact to multiple Microsoft 365 services. We’ve reverted the change and services are recovering. Additional information can be found at http://status.office.com or in the admin center under MO223756.

Our investigation determined that a network infrastructure change resulted in accessibility issues. Our telemetry indicates that service is recovering following the reversion. More details can be found at http://status.office.com or in the admin center under MO223756.

We’re observing continued improvement for a majority of Microsoft 365 services and are taking additional action to mitigate impact for the remaining services. For a full list of recovered services, please visit http://status.office.com.

We’ve validated that service has been restored for MO223756. Additional information regarding the continued admin center impact can be found http://status.office.com.

It was again a change in the network infrastructure that caused this disruption. However, Microsoft now claims the issue have been solved. Is anyone affected by this outage?


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