M365 Service Health Notification

Microsoft 365 suite service alert Incident information Title: Can't access Microsoft 365 services ID: MO222965 Status Service Restored Details Title: Can't access Microsoft 365 services User Impact: Users may have been unable to access multiple Microsoft 365 services. More info: Users may have been unable to access any services that leveraged Azure Active Directory (AAD) including Outlook, Microsoft Teams and Teams Live Events as well as Office.com. Additionally, Power Platform and Dynamics365 properties were also affected by this incident. Existing customer sessions were not impacted and any user who was logged in to an existing session would have been able to continue their sessions. Final status: After extended monitoring of our service, we have confirmed that the issue has been fully mitigated and is running within optimal service levels. If you remain impacted please engage with your support representatives to further assist with any additional issues. Scope of impact: Any user may have experienced access problems for Microsoft 365 services. Start time: Monday, September 28, 2020, at 9:25 PM UTC End time: Tuesday, September 29, 2020, at 2:25 AM UTC Preliminary root cause: A code issue caused a portion of our infrastructure to experience delays processing authentication requests, which prevented users from being able to access multiple M365 services. Next steps: - We're reviewing our code to understand what caused the code to stop processing authentication requests in a timely fashion. We'll publish a post-incident report within five business days. Thank you, The Microsoft team To customize what's included in this email, who gets it, or to unsubscribe, set your Service health preferences. If you are receiving this email because your Admin added you as a recipient, please contact your Admin to unsubscribe. Microsoft respects your privacy. Review our online Privacy Statement. Microsoft Corporation One Microsoft Way Redmond, WA USA 98052