Outlook’s outage may be cascading across the internet, users report

Microsoft reported problems with its internet services, including Outlook, beginning midday Thursday, and the Microsoft 365 status account said the issue "may affect Microsoft 365 service connectivity for users in any region." DownDetector logged outage spikes for Microsoft Outlook, Microsoft 365, Microsoft Copilot, OneDrive and Microsoft Teams, along with Amazon, Facebook, Salesforce, Anthropic's Claude, Slack and Reddit, though Cloudflare Radar, Google's cloud status page and the AWS Health Dashboard reported no issues beyond a localized problem in AWS's Tokyo cloud service. No root cause has been identified.

Microsoft reported problems with its internet services, including Outlook, beginning midday on Thursday. However, users began reporting that other services may be affected as well. Originally, the outages seemed to be confined to Microsoft’s services, as users immediately noticed issues with Outlook email failing to be delivered. DownDetector, which tracks the online status of most major online services, reported that Microsoft Outlook, Microsoft 365, Microsoft Copilot, OneDrive, and Microsoft Teams all were suffering outages, as reported by users. However, those weren’t the only affected, as the service also reported similar spikes in outages from Amazon, Facebook, Salesforce, Anthropic’s Claude, Slack, and Reddit. Foundry “While we’re working to mitigate impact, we’ve confirmed the issue may affect Microsoft 365 service connectivity for users in any region,” the Microsoft 365 status account https://x.com/MSFT365Status reported. DownDetector’s findings weren’t immediately reproduced by the services themselves. The CloudFlare Radar service https://radar.cloudflare.com/outage-center noted no issues. Google’s cloud status page https://status.cloud.google.com/ also reported no issues. Amazon’s AWS Health Dashboard https://health.aws.amazon.com/health/status?tag=pcworld02-20&asc refurl=https://www.pcworld.com only noted a localized problem in its Tokyo cloud service. So far, a root cause has yet to be identified. This is an ongoing story and will be updated as needed.