A major global outage affecting Microsoft’s services has disrupted businesses, government agencies and everyday users across multiple countries, with products including Outlook, Microsoft Teams and AI assistant Copilot experiencing connectivity problems. The disruption has also affected third-party technology companies, including OpenAI and Anthropic, highlighting the widespread dependence of digital services on Microsoft’s cloud infrastructure.
Microsoft has ruled out a cybersecurity incident and attributed the disruption to unusually high infrastructure loads. However, attempts to restore normal operations have faced difficulties, with users continuing to report intermittent access problems even as recovery efforts progress.
Credits: Mashable
Microsoft 365 outage affects multiple services
The disruption has affected several products within Microsoft’s 365 ecosystem, leaving users unable to access essential workplace tools.
Outlook has been among the most severely affected services, with customers reporting difficulties sending and receiving emails, accessing files and viewing calendar information. Microsoft Teams has also experienced connectivity issues, although some users have continued to access its messaging and online meeting features.
Microsoft’s AI assistant Copilot has similarly faced disruptions, adding to the difficulties for businesses and individuals relying on AI-powered productivity tools.
The extent of the disruption has varied across users, with some experiencing complete service interruptions while others have reported slower performance or intermittent connectivity.
More than 140,000 users report Outlook problems
The full scale of the outage remains unclear, although the available figures suggest that the disruption has affected a substantial number of users.
Microsoft 365 has more than 430 million users worldwide, according to the company’s website. Meanwhile, outage monitoring platform Downdetector recorded approximately 140,000 reports of Outlook-related problems from users across 74 countries on Thursday evening.
The actual number of affected users is likely considerably higher, as Downdetector primarily relies on individuals voluntarily reporting service disruptions.
The outage has also extended beyond Microsoft’s own products. OpenAI reported connectivity problems affecting its connections to Microsoft’s services, resulting in some tools not functioning as expected. Anthropic also reported issues linked to the disruption.
Government agencies, hospitals and businesses face disruption
The outage has had consequences beyond workplace productivity, affecting essential communication systems and public services across several countries.
In the United States, courts in Los Angeles and Texas warned that communications could be delayed. Government organisations and public agencies also reported disruptions.
In Canada, public broadcaster CBC reported that a healthcare network operating several hospitals in Toronto was experiencing email problems. However, the disruption did not affect patient care.
Japan’s government also confirmed that its shared IT platform had been disrupted.
The United Kingdom experienced widespread operational difficulties, with GP surgeries, pharmacies, police forces and schools among the affected organisations. Some GP practices advised patients against submitting online messages while the disruption continued, while several police forces encouraged the public to call to report incidents.
The incidents underline how heavily public services and critical organisations depend on email and cloud-based communication platforms for their daily operations.
Microsoft attributes outage to unusually high infrastructure load
Microsoft has said the outage was not caused by a cyberattack, instead pointing to elevated load across its infrastructure.
According to the company, several servers unexpectedly became unavailable, redirecting additional traffic towards the remaining operational infrastructure. The increased demand placed further pressure on those servers, contributing to connectivity problems across multiple services.
The company initially acknowledged that its recovery measures were not producing the expected results.
However, on Friday afternoon, Microsoft reported encouraging recovery progress in Europe and improvements in North America. It said efforts were continuing to address the remaining disruptions, while warning that some customers could still experience intermittent problems.
Credits: The Scotsman
Why is the Microsoft outage taking so long to resolve?
The prolonged disruption has raised questions about the resilience of infrastructure supporting some of the world’s most widely used digital services.
Former software engineer Gergely Orosz, who previously worked at companies including Skype and Uber, described the incident as potentially one of the most disruptive business email outages ever experienced.
Cybersecurity expert Troy Hunt also highlighted the broader implications, noting that Microsoft’s infrastructure plays a critical role across the internet.
Beyond preventing employees from communicating and completing work, an extended email outage can disrupt appointment confirmations, online purchases, account verification and access to other digital services.
The incident highlights the risks associated with the concentration of essential digital infrastructure within a handful of technology providers. Even when individual services remain operational, disruptions to underlying infrastructure can create a ripple effect across businesses, governments and third-party platforms worldwide.
