Users may be unable to access multiple Microsoft 365 services

We've now resolved the incident. Thanks for yoMore info: Impact was to the following services, but was not limited to them: -Microsoft Teams -Exchange Online -Outlook -SharePoint Online -OneDrive for Business -Microsoft Graph -Power BI -Microsoft 365 admin portal -Microsoft Intune -Microsoft Defender for Cloud Apps, Identity and Endpoint.

Users who could access may have experienced degraded feature functionality within the services.

Final status: We've confirmed, after a period of monitoring, that the majority of impacted services have been recovered and remain stable. We're investigating some potential impact to the Exchange Online Service when connecting through Outlook on the web. For further information on the impact to the Exchange Online service please see EX502694 in the Service Health Dashboard.

Scope of impact: Any user serviced by the affected infrastructure may have unable to access multiple Microsoft 365 services.

Start time: Wednesday, January 25, 2023, 7:05 AM (7:05 AM UTC)

End time: Wednesday, January 25, 2023, 12:43 PM (12:43 PM UTC)

Preliminary root cause: A wide-area networking (WAN) routing change resulted in users being unable to access multiple Microsoft 365 services.

User Impact: Users may be unable to access multiple Microsoft 365 services.

More info: Impact is occurring to the following services but is not limited to them:

-Microsoft Teams

-Exchange Online

-Outlook

-SharePoint Online

-OneDrive for Business

-Microsoft Graph

-Power BI

-Microsoft 365 admin portal

-Microsoft Intune

-Microsoft Defender for Cloud Apps, Identity and Endpoint.

Users who can access may experience degraded feature functionality within the services.

Current status: The majority of the services have recovered and remain stable. However, we’re investigating limited residual impact within the Exchange Online service and we're performing targeted mitigations to resolve the issue.

Scope of impact: Any user serviced by the affected infrastructure may be unable to access multiple Microsoft 365 services.

Root cause: A wide-area networking (WAN) routing change is causing impact to the multiple services.

Next update by: Wednesday, January 25, 2023, 2:00 PM (2:00 PM UTC)

More info: Impact is occurring to the following services but is not limited to them: -Microsoft Teams -Exchange Online -Outlook -SharePoint Online -OneDrive for Business -Microsoft Graph -Power BI -Microsoft 365 admin portal -Microsoft Intune -Microsoft Defender for Cloud Apps, Identity and Endpoint.

Current status: We're monitoring telemetry which continues to show that the service is stable, and the majority of users are able to access the service successfully. We’re continuing to monitor the service and take actions to confirm full recovery.

Scope of impact: Any user serviced by the affected infrastructure may be unable to access multiple Microsoft 365 services.

Root cause: A wide-area networking (WAN) routing change is causing impact to the multiple services.

Next update by: Wednesday, January 25, 2023, 1:00 PM (1:00 PM UTC)

QUICK UPDATE

We're continuing to monitor the recovery across the service and customers are also reporting mitigation. We’re also connecting the service to additional infrastructure to expedite the recovery process.

Our telemetry indicates that majority of the customers have now mitigated.

Impact is occurring to the following services but is not limited to them: -Microsoft Teams -Exchange Online -Outlook -SharePoint Online -OneDrive for Business -Microsoft Graph -Power BI -Microsoft 365 admin portal -Microsoft Intune -Microsoft Defender for Cloud Apps, Identity and Endpoint.

Current status: We’ve identified that a wide-area networking (WAN) routing change caused impact to the service. We’ve rolled back the change and monitoring the service as it recovers. Some of the customers who had previously reported impact are also reporting recovery.

Scope of impact: Any user serviced by the affected infrastructure may be unable to access multiple Microsoft 365 services.

Next update by: Wednesday, January 25, 2023, 12:00 PM (12:00 PM UTC)