What happened?Starting at 12:30 CST (China Standard Time) on 22 October 2024, Microsoft identified an increase in traffic between the China Telecom network and the Azure Commercial cloud. This increase was causing higher latency and packet loss for communications between services hosted in the Commercial cloud and the Azure China cloud. Customers using China Telecom to access services hosted in the Azure Commercial cloud may have also seen impact.&nbsp;Azure engineers worked with China Telecom to mitigate the issue between the Azure China cloud and the Commercial cloud.At 16:50 CST the traffic conditions reverted to normal state between Azure China and Azure commercial cloud. All services now are mitigated.&nbsp;Azure engineers continue to work with China telecom to monitor the traffic.&nbsp;What happens next?Our team will be completing an internal retrospective to understand the incident in more detail. We will publish a Preliminary Post Incident Review (PIR) within approximately 72 hours, to share more details on what happened and how we responded. After our internal retrospective is completed, generally within 14 days, we will publish a Final Post Incident Review with any additional details and learnings.To get notified when that happens, and/or to stay informed about future Azure service issues, make sure that you configure and maintain Azure Service Health alerts – these can trigger emails, SMS, push notifications, webhooks, and more: https://aka.ms/ash-alerts .For more information on Post Incident Reviews, refer to https://aka.ms/AzurePIRs .The impact times above represent the full incident duration, so are not specific to any individual customer. Actual impact to service availability may vary between customers and resources – for guidance on implementing monitoring to understand granular impact: https://aka.ms/AzPIR/Monitoring .Finally, for broader guidance on preparing for cloud incidents, refer to https://aka.ms/incidentreadiness .

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