“We have observed a widespread recovery and stability across all our services,” the company stated following a massive digital blackout that crippled apps in more than 70 countries.
A technical glitch in Microsoft servers left millions of users without email, collaboration tools, and artificial intelligence functions for over a day. The incident began on Thursday in the Americas and spread globally, affecting businesses, airlines, and state agencies before registering a gradual recovery.
The greatest impact was concentrated on Exchange Online, the core platform that manages emails, calendars, and tasks for businesses and institutions. Reports on the Downdetector platform peaked at nearly 140,000 notifications shortly after the outage began.
We’re continuing to see improvements in service availability, with email queues significantly reduced and approaching normal levels. Some users may still experience intermittent access issues or delayed email delivery as recovery continues. We’ve implemented additional mitigation…
Users worldwide reported being unable to send or receive messages, schedule meetings, or check invitations in their apps. The video-calling platform Teams experienced calendar-related difficulties, although its calls and group chats remained mostly operational.
Singapore’s Government Technology Agency reported the failure of official emails, while the Supreme Court of the Philippines announced that the Microsoft 365 outage disrupted its operations, including digital responses.
We’re seeing encouraging recovery progress, with service availability and email delivery performance improving across a growing portion of affected Microsoft 365 infrastructure. Some users may still experience intermittent issues as recovery actions continue. We’re focused on…
The disruption transcended the corporate sphere and upended the operations of governments and essential public services across multiple continents, affecting administrations such as Japan’s and Australia’s. In New Zealand, a health entity resorted to manual methods to maintain some of its tasks, while Immigration New Zealand temporarily suspended the processing of visa applications due to the outage.
The Supreme Court of the Philippines and ministries in Japan also reported failures in their digital communications. In the transportation sector, airlines such as Air India and IndiGo had to redirect their email support channels after their usual systems became inoperative.
Australian Minister for Home Affairs Tony Burke confirmed after speaking with company authorities that the situation stems from an internal configuration error comparable to the 2024 CrowdStrike incident.
The company ruled out any cyberattack and attributed the failure to heavy overload on its infrastructure. Microsoft explained that a technical issue linked to an update prevented machines from synchronizing correctly, with more than 19,600 failure reports per minute recorded at the peak of the incident on essential platforms such as Outlook, Microsoft Teams, and Copilot 365.
We’re seeing early stabilization and capacity improvements as recovery actions continue. To help preserve delayed mail during this event, we’ve extended email timeout to 48 hours. A more comprehensive update can be found at MO1550821 in the Microsoft 365 admin center, as well as…
We are encountering issues with machines getting stuck in a bad state, which prevents our changes from synchronizing as expected.
Microsoft, in an update to its report
Although services began to stabilize, some users are still experiencing intermittent access and email delivery delays as technical monitoring continues.
We're engaged in multiple workstreams to alleviate impact, address our current blocker, and returning portions of service infrastructure back to a healthy state. A more comprehensive update can be found at MO1550821 in the Microsoft 365 admin center, as well as…
More on Exchange Online
We’ve monitored the status of the changes applied to improve serviceability and confirmed they're not taking as expected. We’re identifying alternate workstreams that can be applied to increase capacity in the face of sustained traffic management imbalances. More info under…
We've reviewed known impact scenarios and revised the list of impacted services and features, which can be viewed in the "more info" section of the communication MO1550821 in the Microsoft 365 admin center, as well as https://t.co/uFnnN6Svuf if the admin center is not available…
The servers we returned to service can become unresponsive again once they receive traffic; we're analyzing diagnostic data to determine what's triggering the behavior. In parallel, we're temporarily limiting which types of traffic can reach the affected infrastructure in some…
We're returning a portion of affected servers to the service, and they remain stable so far. We're also shifting traffic to alternate routes wherever possible and observing limited recovery. In parallel, we've streamlined the process of returning the remaining affected servers to…
We've validated an alternative service health check method, which allowed a subset of affected servers to successfully return to service. We're now applying this change more broadly. We're also preparing automated recovery systems to continually detect and restart unresponsive…
We’re opening all available pathways to restore service, as our actions taken thus far have not provided the anticipated relief. We found a core process on affected servers is becoming overwhelmed, causing capacity loss. To validate a potential recovery, we're isolating a portion…
We’re seeing encouraging recovery progress, with service availability and email delivery performance improving across a growing portion of affected infrastructure. We know our customers rely on our services to get important work done every day, and regret the impact these outages…
