A significant outage impacting Microsoft 365 services has led to widespread disruption across the globe, affecting millions of users, including major corporations and government entities. Starting on Thursday, 12 November, the problems were reported before 11:17 a.m. ET, with more than 140,000 individuals in 74 countries experiencing issues.
According to reports from outage monitoring services, such as Downdetector, the scale of the disruption was unprecedented. By 1:25 p.m. ET, the platform noted nearly 20,000 complaints each minute regarding five crucial Microsoft services, a marked increase compared to typical usage on a standard Thursday.
Among the applications severely affected by the outage were Outlook, Teams, and Copilot. Notably, the U.S. House of Representatives confirmed it had encountered difficulties with these services, prompting its engineers to collaborate with Microsoft to resolve the ongoing issues. The extension of the outage has particularly disrupted governmental operations, with several state and municipal governments across the United States reporting complications.
Officials from Baltimore County indicated that their staff faced challenges sending and receiving emails, while the City of Austin echoed similar frustrations via social media. Meanwhile, in Jacksonville, Florida, city representatives stated that the outage was adversely influencing essential software applications, including email services.
In Colorado, the disruption was serious enough to affect the Arapahoe County Sheriff’s Office, which mentioned on Facebook that the inability to access Microsoft services was hindering the posting of bail for incarcerated individuals. In Japan, Deputy Chief Cabinet Secretary Masanao Ozaki confirmed that the outage had impacted government operations, illustrating the extensive reach of the problem.
The ripple effects also reached countries far from the US, with officials in Australia acknowledging that both the federal police and intelligence agencies were hindered by the outage. The Singaporean government similarly reported disruptions, as did various schools, police forces, and medical offices across the United Kingdom.
The vast array of organisations relying on Microsoft 365 has resulted in a domino effect across diverse industries. Major tech firms such as OpenAI and Anthropic, responsible for the development of AI tools including ChatGPT and Claude, respectively, also encountered setbacks due to the outage.
In an official statement on social media, Microsoft executive Charles Lamanna expressed regret over the disruption, stating, “We are working to address the issue.” Lamanna clarified there was no evidence to suggest that the outage originated from a cyberattack or malicious interference, stating that the company was continuing to investigate.
By the early hours of Friday, 13 November, Microsoft confirmed that users were still facing connectivity issues with various 365 services, although they assured that progress was being made in resolving the matter. They reiterated their commitment to tackling the situation urgently and promised to release a post-incident report detailing the root causes and corrective measures once the issues had been fully addressed.
Despite the extensive reach of the outage, Microsoft has not disclosed the total number of affected users. However, it was noted that Microsoft 365 services are widely adopted, boasting an estimated 430 million users worldwide.
Microsoft’s other outages earlier this year had already highlighted vulnerabilities in its service. In January, users similarly reported problems sending emails, with Microsoft stating service degradation and access issues were being addressed promptly. The company managed to restore functionality at that time, but this latest incident underscores the ongoing challenges related to service reliability.
As the situation unfolds, both individuals and organisations reliant on Microsoft services are left awaiting a robust resolution, whilst the company strives to ensure such disruptions are mitigated in the future.
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