A sweeping disruption to Microsoft 365 entered its second day on Friday, November 13, 2026, leaving businesses, government offices and individual users struggling with email, calendars and connected workplace services. The outage began on Thursday and spread across regions, affecting Microsoft Outlook, Exchange Online and features of Teams, Copilot and other applications that depend on Microsoft’s cloud infrastructure.
Microsoft reported substantial progress toward restoring its systems on Friday, including improvements in North America, Europe and parts of the Asia-Pacific region. Yet the company had not declared the incident fully resolved. Some customers were still encountering intermittent access errors, while emails delayed during the disruption were waiting to be delivered. The scale and duration turned a technical breakdown into a major test of how organizations operate when a central communications provider becomes unavailable.
What Happened to Microsoft 365?
Microsoft first acknowledged problems accessing Exchange Online mailboxes on Thursday, November 12. What initially appeared to be an email-access incident developed into a much wider disruption as users across different countries reported failed sign-ins, inboxes that would not load and delays sending or receiving messages. Outlook users were particularly hard hit because Exchange Online provides the underlying email and calendar functions used by many businesses.
The outage monitoring website Downdetector recorded nearly 130,000 reports concerning Outlook from users in the United States near the initial peak. Reports of Microsoft-related problems emerged in 74 countries and territories within roughly an hour. These figures are reports submitted to an outage tracker, not a verified count of distinct users affected. Microsoft has not provided a definitive total for the incident.
Which Microsoft Services Were Affected?
The most obvious problems involved Outlook on the web and desktop, Exchange Online mailbox connections and delayed email delivery. The disruption also affected parts of Teams, including calendar operations, meeting invitations and scheduling. Microsoft said many core Teams functions, such as joining calls and using regular chats, remained available; therefore, it would be misleading to describe every Teams feature as completely offline.
Microsoft 365 Copilot users faced difficulties loading chats, getting responses and accessing work information associated with email, files and calendars. Other reported trouble spots included features of SharePoint Online, Microsoft 365 administrative tools, education services and some consumer applications such as OneDrive, OneNote and Microsoft To Do. The extent of the disruption varied by service and user. The outage should not be confused with a confirmed, across-the-board failure of Microsoft’s Azure cloud platform.
What Caused the Microsoft Outage?
Microsoft’s early investigation identified an unusual burden on the servers handling connections. Crucially, the company said this was not the result of ordinary growth in user traffic. Instead, servers had unexpectedly become unavailable, forcing the surviving infrastructure to handle connections that would normally have been distributed more widely. Engineers also examined server-health processing, secure-connection handling and recent configuration changes as possible contributors.
Restoring servers proved difficult. Some systems came back online but became unresponsive again when traffic returned, undermining the first recovery attempts. Microsoft’s response included shifting connections to alternative paths, restarting affected machines, restricting certain traffic, testing configuration changes and patching components involved in authentication and routing. Those measures provided clues and partial relief, but the company had not issued a final root-cause explanation as of Friday’s recovery updates.
Microsoft also said it had no evidence that malicious or cyber activity caused the outage. That statement is narrower than a completed forensic finding: the company promised a detailed post-incident report after the disruption is fully resolved. Comparisons with the 2024 CrowdStrike crisis surfaced in comments from Australian officials, but the two events should not be treated as having an established identical cause.
How Businesses and Governments Were Disrupted
The problems reached well beyond office inconvenience. In Britain, a trial in Manchester was interrupted when technological delays forced proceedings to stop. Police forces warned that some online crime-reporting functions were unavailable, while health services adopted backup procedures as email problems threatened routine administration and prescription-related communications. The National Health Service and other public bodies had to consider alternative ways to keep essential work moving.
The disruption affected government communications in Australia, Japan, Singapore, Norway and the Philippines. Singapore reported government-email difficulties, and the Philippine Supreme Court warned that some operations, including email replies, were affected. Japanese officials turned to alternative communication arrangements. In Australia, federal agencies and public institutions reported problems, illustrating the reach of a cloud service relied on by both commercial and public-sector customers.
Financial and corporate operations were also interrupted. Reuters reported email issues at European exchange operator Euronext, backup arrangements at insurer Aviva and delayed updates for shipping customers of Maersk. Some Taiwanese financial firms resorted to fax machines to confirm transactions. In the United States, electric-vehicle manufacturer Workhorse Group postponed an earnings-related call, while other businesses encountered delays in communicating with customers and investors.
Impact on India: Airline Email Support Hit
India was among the countries affected on Friday. IndiGo told customers that the global Microsoft service disruption had interfered with its email support and might prevent it from receiving some messages. The airline directed customers requiring assistance to its other channels, including its website and app. It said flight operations were not affected.
Air India also reported that its flight operations continued normally and said it temporarily rerouted email services to maintain customer support. Akasa Air was among the Indian carriers reporting email-support difficulties. These distinctions matter: the disruption affected airline communications, but the available airline statements did not establish that Microsoft itself had grounded flights in India.
Microsoft Reports Recovery, but Email Backlogs Remain
By Friday, Microsoft was describing a more stable recovery. It reported wider improvements across North America and much of Europe, along with encouraging signs in the Asia-Pacific region. It also said access to mailboxes and email-processing performance were improving as engineers restored capacity and brought affected systems back into service in stages.
A central challenge remained the backlog of messages that built up while mail systems were unavailable or slow. Microsoft extended an email timeout window to 48 hours to help protect delayed messages from being returned before delivery could catch up. That change did not mean every queued message had already arrived, nor did it amount to a promise that all accounts would recover at the same moment. Recovery could differ across organizations, locations and connection methods.
When Will Outlook and Teams Be Fully Restored?
Microsoft had not announced a reliable time for complete restoration in the updates available on Friday, November 13. The company said it would continue stabilizing recovered infrastructure, repairing remaining affected areas and clearing delayed email queues. It was also monitoring whether previously restored services remained healthy once normal traffic resumed.
Users should check Microsoft’s official service-health updates or their organization’s Microsoft 365 administrator for the status of affected services. Businesses awaiting important messages may need to confirm delivery by phone or through another established communication channel rather than assuming that a sent email has reached its intended recipient. They should also be alert to phishing messages that use the outage as a pretext for fake sign-in or account-repair instructions.
Why the Disruption Matters
The incident exposed how deeply public services and businesses depend on a small number of cloud platforms. Email, meeting calendars, customer support, digital workflows and AI assistants increasingly share connections to the same identity, messaging and data systems. A fault in a central service can therefore interrupt activities that appear unrelated on the surface.
For organizations, the immediate lesson is practical rather than theoretical: critical contacts, incident procedures and alternatives to email need to remain usable when the usual collaboration tools are not. Microsoft had made measurable progress by Friday, but the outage’s full financial impact, technical cause and duration will be clearer only after normal service is restored and the company publishes its promised incident review.
Satyakam is a seasoned professional content writer with over 15 years of experience in creating high-quality, research-driven content for digital platforms. He specialises in business, finance, banking, law, technology, and informational blogs.
