WASHINGTON (Realist English). The outage began on Thursday, 12 November, and by the morning of Friday, 13 November, had spread across North America, Europe and the Asia-Pacific region. The peak of complaints on Downdetector came on Thursday evening: almost 140,000 reports of problems with Outlook and more than 47,000 for Microsoft 365. By the evening of 12 November, the number of new complaints had decreased, but the outage had still not been resolved.
Cause: server overload, not an attack
According to Microsoft’s technical updates, many servers unexpectedly became unavailable, overloading the remaining infrastructure. The process responsible for establishing secure connections became overloaded and could not handle requests.
Engineers tried restarting servers, redistributing traffic and rolling back configurations, but some servers failed again when users connected after restoration. Microsoft stressed that it sees no signs of malicious activity or a cyberattack.
Consequences for business and governments
The outage affected more than just email. Swiss luxury holding Richemont and American truck manufacturer Workhorse Group were forced to postpone the publication of financial reports. PVH Corp. (owner of Calvin Klein and Tommy Hilfiger), which announced a 4% staff reduction, was unable to hold some scheduled meetings with employees in Asia.
In the UK, Guy’s and St Thomas’ hospitals warned patients of email outages, although procedures proceeded as planned. In Japan, the Ministry of Finance could not receive emails for most of the day, and officials had to post paper notices for journalists. In New Zealand, immigration authorities suspended processing of all visa applications. In the US, sheriffs’ departments in Los Angeles and Arapahoe County faced disruptions in communications and processing of online bail payments.
Fragility of digital infrastructure
This outage is not the first major incident for Microsoft in 2026. A similar outage of Microsoft 365 services occurred in January, and last month a failure of the Azure cloud platform caused global disruptions. Experts note that the incident illustrates the risk of a single point of failure: when a key technology provider encounters problems, the consequences spread to the global economy.
The current outage, already being called “one of the largest in history,” exposes the fundamental vulnerability of global digital infrastructure. Microsoft, whose services are used by 430 million people, was unable to quickly localize the problem, undermining trust in cloud solutions as a reliable corporate foundation.
It is telling that the outage affected not only email and messengers but also the Copilot AI assistant, as well as payment and visa systems, demonstrating how deeply Microsoft products are embedded in critical processes. The key question is whether the company can restore full functionality in the coming hours and what conclusions corporate clients will draw about the need to diversify their IT ecosystems.
