A Microsoft 365 outage lasting more than 22 hours disrupted Outlook and other services, exposing how much businesses and public institutions depend on a small number of technology companies. Microsoft said routine automated checks took some servers offline, pushing excess traffic onto those still running. The company ruled out a cyber-attack, apologised, and restored services gradually to avoid further instability. About 430 million people use Microsoft 365, and problems were reported in more than 70 countries. The effects reached far beyond office email: systems at the US House of Representatives and Australian intelligence agencies were affected, while courts in Singapore and airline support desks in India also faced disruption.
Business and technology experts described the incident as a warning about the fragility of essential services when they rely on a single provider. For small and medium-sized businesses, email supports daily operations, customer and supplier communications, and revenue generation. A former technology engineer said the unusually long recovery intensified concerns about dependence on a few large US firms; one possible safeguard is to divide services by region, limiting the reach of failures. An AI strategist warned that as assistants gain access to email, calendars, and files, outages could disrupt even more interconnected activities. Microsoft is reviewing the failure to guide measures intended to prevent a recurrence.
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