Unable to access one or more Microsoft 365 services

Title: Unable to access one or more Microsoft 365 services
User impact: Users may have been unable to access one or more Microsoft 365 services.
More info: The majority of reports were for impact to Microsoft Teams. Impact may have included, but was not limited to:
Microsoft Teams
– Users may have been unable to make or receive calls.
– Users may have been unable to join meetings.
– Users may have been unable to send and receive messages.
– Users may have been unable to create new Chats or Channels.
– Users may have seen incorrect presence information.
Exchange Online
– Users may have been unable to send or receive email.
Power Apps
– Users may have been unable to access the service.
Power Automate
– Users may have been unable to access the service.
Final status: We determined that an artificial increase in synthetic network traffic resulted in DNS issues. We’ve made configuration changes within the networking infrastructure to remediate impact. We’ve monitored the service and have confirmed that the issue is resolved.
Scope of impact: This issue primarily impacted users attempting to access the service from within the European region. However, due to the nature of the issues, users from other regions may have been affected.
Start time: Friday, November 10, 2023, at 8:50 AM UTC
End time: Friday, November 10, 2023, at 10:42 AM UTC
Preliminary Root cause: An artificial increase in synthetic network traffic resulted in DNS issues, causing impact.
Next Steps:
– We’re further reviewing the event and the circumstances that lead to impact, so that we can identify next steps that’ll help us improve the reliability and resiliency of our service.
We’ll publish a Post-Incident Report for this event within five business days.