Microsoft 365 services including Outlook, Teams, and Copilot remained disrupted Friday, extending into a second day after the company's overnight repair efforts fell short, according to Microsoft's status updates. The failures cut off email and communications tools for organizations and individuals worldwide. By midmorning Friday, Microsoft reported seeing sustained gains in service availability.
Microsoft said Thursday evening that its first remediation attempts were not working as expected. In a status update Thursday afternoon, the company said server load was elevated not by a traffic increase but by an unexpected number of servers becoming unavailable and straining remaining infrastructure. Microsoft later said a configuration change was being tested to address servers failing automated health checks, and that a specific component responsible for processing server health was the likely origin of those failures, though it had not found any recent change correlated with the start of the impact. The company repeatedly stated there was no indication of a cyberattack.
The outage disrupted schools, courts, governments, and law enforcement agencies globally, along with businesses and employees. Reports began during the working day Friday in Asia and Australasia before spreading worldwide. Australian schools, retailers, courts, and medical organizations reported disruptions to exams and health care appointments. Japanese government officials said their platforms were affected, with staff relying on phones and chat tools because Outlook was inaccessible. Police forces in the UK could not accept online crime reports, and parts of the National Health Service reported impacts. Deutsche Bahn said email outages severely restricted the sending of timetables, and courts, local agencies, and media outlets in the Netherlands reported communications problems.
Doug Madory, head of internet analysis at monitoring firm Infoblox, said the incident would rank among the largest outages, comparable to the Facebook outage of October 2021, and that recovery proceeded unevenly across source data centers. Swapneel Patnekar, CEO of Indian web security firm Shreshta IT Technologies, said the significance stems from the criticality of email and communication systems relied on by governments and essential organizations. Security and compliance consultant Davi Ottenheimer said the 365 name implies a specific duty.
Observers noted recent staffing changes at Microsoft. Annual filings put full-time employees at 223,000 on June 30, down from 228,000 a year earlier. The company eliminated 9,000 jobs in July, including 3,200 tied to an Xbox overhaul, and reportedly offered buyouts to 60,000 employees in October. CEO Satya Nadella said in April that as much as 30 percent of the company's code is generated with AI tools. Jake Williams, a faculty member at IANS, said the staff reductions cannot be blamed for the outage but that departed institutional knowledge would have been valuable in resolving it.
Officials called for reduced dependence on large technology firms. Chi Onwurah, chair of the UK parliament's Science and Technology Committee, said the outage underscored the lack of resilience in the UK's digital infrastructure and the risks that dependency poses to security, economy, and public services. In Canada, Via Rail warned customers may not receive booking details by email, and the Arapahoe County Sheriff's Office in Colorado said online bond payments were not being processed because email notifications were unavailable.
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