Microsoft’s Outlook email service experienced a substantial outage on Thursday, disrupting communications for users across North America with potential ripple effects in other regions. The incident caused widespread difficulties for both individual consumers and enterprise clients attempting to access their mailboxes and related digital tools.
The company first acknowledged the issue at 12:54 p.m. ET via its official Microsoft 365 Status account on X. The post noted that investigators were looking into reports of users facing problems accessing Exchange Online mailboxes through various connection methods within the Americas. At the time of the initial alert, Microsoft had not yet provided an estimated timeline for when full service would be restored.
The disruption extended beyond simple email access to impact several other core Microsoft products. Users reported difficulties with Microsoft Teams, SharePoint Online, and the Copilot 365 AI service. According to the company’s Service Health Status page, the issues meant that users might be unable to connect to multiple Microsoft 365 services simultaneously, highlighting the interconnected nature of the platform's infrastructure.
Data from the monitoring platform Downdetector indicates that user reports of Outlook issues began to surge around 12:39 p.m. ET. By 1:09 p.m. ET, the platform had logged more than 129,000 error reports, underscoring the scale of the disruption. The rapid accumulation of complaints suggested a widespread failure rather than isolated local issues.
By 1:35 p.m. ET, Microsoft provided a technical update, stating that a portion of its infrastructure was experiencing elevated load across multiple regions. The company identified this increased strain as the likely contributor to the connectivity errors. To address the imbalance, Microsoft began redistributing connection traffic across its broader worldwide infrastructure to help balance the load and alleviate pressure on the affected nodes.
In a further update at 2:12 p.m. ET, the company stated that it was aggressively pursuing all available pathways to reduce the impact on users. Microsoft confirmed that it had paused all ongoing deployments to prevent further complications. Additionally, the team was moving additional traffic away from the affected infrastructure and restarting impacted servers to bring them back into active service.
Microsoft clarified that the elevated load was not driven by a sudden increase in user traffic. Instead, the strain resulted from a number of servers becoming unexpectedly unavailable, which placed excessive pressure on the remaining active infrastructure. The engineering team is currently working to safely return these servers to service to normalize operations.
The company has not yet released a final statement on the total duration of the outage, though the active response measures suggest a focus on stability before resuming regular updates. Variety has reached out to Microsoft for additional information regarding the specific technical causes and the broader scope of the incident.
This outage occurs against a backdrop of strong growth for the platform. In January, during an earnings call for the December 2025 quarter, the company reported that Microsoft 365 commercial seats had grown by 6% year-over-year. This growth brought the total number of commercial seats to over 450 million, highlighting the critical importance of the service's reliability for a vast global user base.
