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Exchange Online

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Headlines · 6

  1. Microsoft 365 outage enters second day as services gradually recover

    Microsoft said on November 13 that a nearly two-day global outage was gradually being repaired, with improved availability and mail delivery for Outlook and other Microsoft 365 services, although some users still faced intermittent connection problems. cnBeta reported that the disruption affected Outlook, Teams, Copilot, Word, Excel, PowerPoint, SharePoint and OneDrive worldwide, with OpenAI and Anthropic also encountering Microsoft 365 connection issues. Microsoft attributed the main impact to Exchange Online infrastructure and abnormal server behavior, while saying it had found no evidence of a cyberattack.

    cnBeta · 🔥 20
  2. Microsoft Says Software Service Outage Is Improving

    Microsoft said recovery work on its major software services had made progress, with service conditions improving and the email backlog falling substantially toward normal levels. More than 20 products and services could still produce errors, while users continued to report undelivered meeting invitations and unresponsive web pages. Microsoft attributed part of the disruption to a core server process becoming unresponsive under excessive load, but said the root cause remained undetermined. It planned to publish further technical details after the disruption ended and said there was no evidence of malicious activity, though the investigation was ongoing.

    IT之家 AI · 🔥 5
  3. Microsoft Learn AI Post Draws Criticism During Microsoft 365 Outage

    According to cnBeta, Microsoft Learn asked on X on November 12 what habits AI beginners should adopt while an Exchange Online outage was affecting Outlook, Teams, SharePoint, and Copilot. The post received more than 1.2 million views and over 1,100 replies, with the top-rated response telling Microsoft to ensure its products did not go down again. Microsoft said some servers failed automated health checks, restored servers became unresponsive as traffic returned, and it paused deployments and rolled back recent network configuration changes. The company had not attributed the outage to AI-generated code or workforce reductions, and no complete post-incident report was available at the time.

    Techmeme · 🔥 25
  4. Microsoft 365 Outage Affects Outlook, Teams, Copilot and OneDrive

    A broad Microsoft 365 outage began around 13:25 US Eastern time on November 12, 2026, affecting Outlook, Teams, Copilot, OneDrive and other services. Microsoft’s preliminary investigation attributed elevated load mainly to unexpected server unavailability rather than a traffic surge, placing pressure on the remaining infrastructure. The company said there were no signs or evidence of a malicious cyberattack and paused deployments, released memory, adjusted traffic routing and restarted servers. Eligible enterprise customers may request service credits under their service-level agreements. Under the April 2026 agreement, credits may reach 25%, 50% or 100% when Exchange Online’s monthly availability falls below 99.9%, 99% or 95%, respectively.

    IT之家 AI · 🔥 4
  5. Microsoft 365 outage disrupts Outlook, Teams and Copilot worldwide

    A global Microsoft 365 outage disrupted Outlook, Teams, OneDrive, SharePoint and Microsoft 365 Copilot, affecting governments, businesses, schools and financial-market operations. BBC Technology reported that routine automated checks took some servers offline and overloaded others, while Microsoft described the incident as a technical problem rather than a cyberattack and apologized for the disruption. Microsoft said mitigation efforts included traffic rebalancing, expanding virtual-machine capacity and restarting servers, with services gradually restored over nearly a day.

    cnBeta · 🔥 26
  6. Microsoft 365 Outage Disrupts Copilot, Outlook and AI Connectors

    On November 12, 2026, multiple Microsoft 365 services experienced disruptions, including Outlook, Exchange Online, Teams, OneDrive, SharePoint and Microsoft 365 Copilot. Microsoft said users in any region could be affected; one report said the applications were offline for more than six hours for some users worldwide. Downdetector figures cited by TechNews Taiwan and IT之家 ranged from more than 38,000 Microsoft 365 reports and more than 97,000 Outlook reports at a stated time to nearly 50,000 Microsoft 365 reports and nearly 130,000 Outlook reports at different points. These reports do not represent affected-user counts. Microsoft paused deployments and configuration changes, redistributed traffic and restarted servers. Its investigation found that many servers had unexpectedly become unavailable, placing greater load on the remainder, but Microsoft had not confirmed the underlying root cause. OpenAI and Anthropic separately reported problems affecting their Microsoft connectors; the reports did not establish whether those issues were part of the same failure chain.

    iThome 台湾 · 🔥 40

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