{"slug": "microsoft-s-outage-is-in-its-2nd-day-and-it-s-affecting-claude-here-s-everything", "title": "Microsoft's outage is in its 2nd day, and it's affecting Claude. Here's everything we know.", "summary": "Microsoft's global Microsoft 365 and Outlook outage entered a second day on Friday, with Microsoft reporting at 06:11 a.m. ET \"additional progress toward recovery\" but no timeline for full restoration. Downdetector logged more than 130,000 US reports of Outlook problems at Thursday's peak, and the disruption spread to Teams, SharePoint, Copilot, Microsoft Defender, Intune and Power BI, while Anthropic and OpenAI said their Microsoft 365 connectors were disrupted and Anthropic reported authentication issues affecting Claude Code. Microsoft said the elevated load across multiple regions stemmed from servers unexpectedly becoming unavailable rather than increased customer traffic, and that it had \"no indication\" of malicious activity; the US House of Representatives, Workhorse Group, Air India and IndiGo reported impacts, with the airlines saying flight operations were unaffected.", "body_md": "# Microsoft's outage is in its 2nd day, and it's affecting Claude. Here's everything we know.\n\n[Business Insider](https://www.businessinsider.com)\n\nA global Microsoft 365 outage is disrupting email, Teams, OpenAI's connector, and Claude for Outlook as recovery efforts continue. Here's the latest.\n\n- Microsoft's Outlook outage enters a second day as global recovery efforts continue.\n- Microsoft says a fix is making its servers more stable, but Outlook is still unavailable.\n- The outage is disrupting governments, airlines, and [Claude](https://www.machinebrief.com/glossary/claude) 's Microsoft tools.\n\n[Microsoft's global Outlook outage](https://www.businessinsider.com/microsoft-outage-disrupting-email-ceo-business-leaders-barely-use-it-2026-11) has dragged into a second day, leaving users unable to access email and disrupting Teams, [Copilot](https://www.machinebrief.com/compare/github-copilot-vs-cursor), and other Microsoft 365 tools.\n\nIt has also affected [AI tools](https://www.businessinsider.com/beginners-guide-ai-vibe-coding-lovable-base44-claude-2026-6). [Anthropic](https://www.machinebrief.com/glossary/anthropic) and [OpenAI](https://www.machinebrief.com/glossary/openai) said in status update pages that their connectors to Microsoft 365 tools are disrupted. Anthropic also said that authentication issues were affecting Claude Code, but did not attribute this to the Microsoft outage.\n\nHere's what we know so far about the Microsoft outage that's causing chaos for businesses.\n\n## What's the latest?\n\nMicrosoft said in an 06:11 a.m. ET update on Friday that it had made \"additional progress toward recovery,\" with some mailbox access and delayed email processing improving.\n\nBut it warned that users could still face intermittent issues, and the company has not given users a timeline for a full recovery.\n\n## What happened?\n\nMicrosoft first flagged the outage on Thursday around midday ET, writing in an X post that users in the Americas were having trouble accessing Exchange Online mailboxes. It later said in a follow-up post that the issue could affect users \"in any region.\"\n\nBy Friday morning, Microsoft's public [service status page](https://status.cloud.microsoft/?utm_source) was still showing \"service degradation\" for both Microsoft 365 business customers and consumer products.\n\nMicrosoft said in a later X update on Thursday that some of its infrastructure was under elevated load across multiple regions. It said the strain was not caused by an increase in customer traffic, but because a number of servers had unexpectedly become unavailable.\n\nMicrosoft also said in that 3:34 a.m. update that it had \"no indication\" the disruption was caused by malicious activity.\n\nIn further X updates on Thursday, it said it had taken steps including restarting servers. Early Friday, Microsoft said that servers initially returned to service could become unresponsive again once traffic hit them.\n\n## What's the impact?\n\nThe outage has caused significant disruption for businesses, with many workers unable to use systems such as email or Teams.\n\nDowndetector recorded more than 130,000 reports of Outlook problems in the US at the outage's peak on Thursday. That figure reflects user reports, not a confirmed count of affected people or businesses.\n\nOther Microsoft services are affected too. It said in its [service advisory](https://status.cloud.microsoft/) that the disruption could affect Outlook, Teams, SharePoint, Copilot, Microsoft Defender, Intune, Power BI, and other Microsoft 365 products that rely on Exchange Online.\n\nReuters [reported](https://www.reuters.com/technology/microsoft-365-outlook-down-thousands-us-users-downdetector-shows-2026-11-12/) on Thursday that the US House of Representatives said the outage had affected its users, while electric-truck maker Workhorse Group postponed its quarterly earnings call because of the disruption.\n\nAir India said in a Thursday X post that it had rerouted email services, while IndiGo said in an X post on Friday that its email support channel was disrupted. Both airlines said their flight operations were unaffected. AP also reported that government agencies in Singapore, the Philippines, and Japan had reported knock-on effects.\n\n[Business Insider](https://www.businessinsider.com/microsoft-365-outage-outlook-teams-down-claude-what-we-know-2026-11)\n\nGet AI news in your inbox\n\nDaily digest of what matters in AI.", "url": "https://wpnews.pro/news/microsoft-s-outage-is-in-its-2nd-day-and-it-s-affecting-claude-here-s-everything", "canonical_source": "https://www.machinebrief.com/news/microsofts-outage-is-in-its-2nd-day-and-its-affecting-claude-05w7", "published_at": "2026-11-13 11:37:48+00:00", "updated_at": "2026-11-13 13:21:19.279830+00:00", "lang": "en", "topics": ["ai-products", "ai-tools", "ai-agents"], "entities": ["Microsoft", "Microsoft 365", "Outlook", "Teams", "Copilot", "Anthropic", "Claude", "OpenAI"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/microsoft-s-outage-is-in-its-2nd-day-and-it-s-affecting-claude-here-s-everything", "markdown": "https://wpnews.pro/news/microsoft-s-outage-is-in-its-2nd-day-and-it-s-affecting-claude-here-s-everything.md", "text": "https://wpnews.pro/news/microsoft-s-outage-is-in-its-2nd-day-and-it-s-affecting-claude-here-s-everything.txt", "jsonld": "https://wpnews.pro/news/microsoft-s-outage-is-in-its-2nd-day-and-it-s-affecting-claude-here-s-everything.jsonld"}}