Past Incidents

User Impact: Some users in Europe may have been unable to access Microsoft 365 services.

More info: Users who were able to access the service may have experienced degraded performance such as latency or error messages.

Impacted services included, but were not limited to: SharePoint Online OneDrive for Business Microsoft Teams Microsoft 365 admin center Microsoft Planner Yammer

Final status: After a period of extended monitoring, we've confirmed that impact has been remediated.

Scope of impact: Impact appears to have affected users located in the United Kingdom, however, we've also received of reports of impact from other European countries.

Start time: Friday, December 11, 2020, at 2:00 PM UTC

End time: Friday, December 11, 2020, at 3:55 PM UTC

Preliminary root cause: Network traffic components weren't processing traffic as expected, which resulted in impact.

Next steps:

• We’re reviewing the service code and recent changes made within the network infrastructure to isolate the source of the issue.
• We're analyzing performance data and trends on the affected systems to help prevent this problem from happening again.

We'll publish a post-incident report within five business days.

User Impact: Some users in Europe may be unable to access Microsoft 365 services.

More info: Users who are able to access the service may experience degraded performance such as latency or error messages.

Impacted services include, but are not limited to: SharePoint Online OneDrive for Business Microsoft Teams Microsoft 365 admin center Microsoft Planner Yammer

Current status: We've identified a potential issue with components that route user requests. We've rerouted user connections to alternate components and system telemetry indicated that the service has recovered. We're monitoring the service to confirm resolution.

Scope of impact: Impact appears to be affecting users located in the United Kingdom, however, we've also received of reports of impact from other European countries.

Start time: Friday, December 11, 2020, at 2:00 PM UTC

Root cause: Network traffic components aren't processing traffic as expected, resulting in impact.

Next update by: Friday, December 11, 2020, at 6:00 PM UTC

User Impact: Some users in Europe may be unable to access Microsoft 365 services.

More info: Users who are able to access the service may experience degraded performance.

Impacted services include, but are not limited to: SharePoint Online OneDrive for Business Microsoft Teams Microsoft 365 admin center

Current status: We're reviewing network trace logs to isolate the source of the issue.

Scope of impact: Impact appears to be affecting users located in the United Kingdom, however, we've also received of reports of impact from other European countries.

Next update by: Friday, December 11, 2020, at 4:30 PM UTC