[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"branding":3,"analytics":7,"article-microsoft-365-outage-spreads-from-outlook-to-teams-and-copilot":10,"sections":44},{"siteName":4,"siteTagline":5,"publisherName":4,"contactEmail":6},"The Revision","Tech news, decoded.","editor@therevision.news",{"gaMeasurementId":8,"adsenseClientId":9},"G-ZW2MV82GYR","ca-pub-8533917693782264",{"article":11},{"id":12,"slug":13,"title":14,"dek":15,"body_md":16,"tags_json":17,"published_at":18,"created_at":19,"updated_at":20,"status":21,"review_note":22,"review_notes":23,"image_url":22,"persona_id":22,"persona_name":22,"section":24,"tags":25,"sources":30,"feedback":43,"feedback_at":22,"cost_usd":43,"total_tokens":43},12990,"microsoft-365-outage-spreads-from-outlook-to-teams-and-copilot","Microsoft 365 Outage Spreads From Outlook to Teams and Copilot","Microsoft first described an Americas mailbox problem, then said any region could be affected by elevated load on a portion of its infrastructure.","A Microsoft 365 outage on November 12 cut off Outlook mailboxes and then spread to Teams, SharePoint Online, Copilot 365 and Defender XDR, according to the company's status page.\n\nUser error reports on DownDetector, a site that tallies complaints from the public, began climbing around 12:30 p.m. ET. By 1:12 p.m. ET it had logged more than 130,000. At 12:54 p.m. ET, Microsoft's 365 status account on X acknowledged problems reaching Exchange Online mailboxes \"through multiple connection methods in the Americas.\"\n\nThat framing did not hold. By 1:45 p.m. ET the company said the issue \"may affect Microsoft 365 service connectivity for users in any region\" and that \"a portion of infrastructure is experiencing elevated load across multiple regions, which is likely contributing to the connectivity errors.\" It pointed administrators to incident EX1550543. As of 2:20 p.m. ET, the status page warned that users may be unable to connect to multiple 365 services. Microsoft's consumer products should be unaffected, it said. At one point the status page itself would not load for reporters.\n\nThe widening scope is the useful detail. A mailbox fault is an annoyance. A fault touching email, chat, file storage, an AI assistant and a security monitoring tool at once suggests these products lean on common plumbing, and an enterprise customer cannot easily route around that. The note that Defender XDR was affected matters in particular, since it is the tool some companies use to watch for attacks.\n\nThe company's wording is also hedged: the load is \"likely contributing,\" not confirmed as the cause. That differs from Outlook's previous widespread outage in August, which Microsoft attributed to a misconfiguration that stopped authentication components from deploying correctly. Two outages with two different stated causes is not a pattern by itself. The open question is whether the load problem is the root cause here or a symptom of something upstream that Microsoft has yet to name.","[\"microsoft\",\"outlook\",\"outage\",\"microsoft-365\"]","2026-11-12T19:26:20.000Z","2026-11-12T19:50:37.269Z","2026-11-12T19:50:39.692Z","published",null,[],"software",[26,27,28,29],"microsoft","outlook","outage","microsoft-365",[31,34,36,38,40],{"name":32,"url":33},"Mashable","https:\u002F\u002Fmashable.com\u002Ftech\u002Fmicrosoft-outlook-outage-nov-12-2026",{"name":32,"url":35},"https:\u002F\u002Fmashable.com\u002Ftech\u002Fmicrosoft-outage-affecting-365-teams-outlook-copilot-nov-12-2026",{"name":32,"url":37},"https:\u002F\u002Fmashable.com\u002Ftech\u002Fmicrosoft-outlook-outage-365-down-reactions-nov-12-2026",{"name":32,"url":39},"https:\u002F\u002Fmashable.com\u002Ftech\u002Fmicrosoft-outage-what-company-has-said",{"name":41,"url":42},"MacRumors","https:\u002F\u002Fwww.macrumors.com\u002F2026\u002F11\u002F13\u002Fmajor-microsoft-365-outage-continues\u002F",0,{"sections":45},[46,51,56,61,66,71,76,81,85,90,95,100,105,110],{"name":47,"slug":48,"count":49,"latest_published_at":50},"AI","ai",7151,"2026-11-13T11:05:00.000Z",{"name":52,"slug":53,"count":54,"latest_published_at":55},"Security","security",1132,"2026-11-12T15:35:00.000Z",{"name":57,"slug":58,"count":59,"latest_published_at":60},"Deals","deals",653,"2026-11-13T11:52:26.000Z",{"name":62,"slug":63,"count":64,"latest_published_at":65},"Policy","policy",621,"2026-11-12T19:54:30.000Z",{"name":67,"slug":68,"count":69,"latest_published_at":70},"Consumer Tech","consumer-tech",370,"2026-11-12T17:00:00.000Z",{"name":72,"slug":73,"count":74,"latest_published_at":75},"Hardware","hardware",337,"2026-11-12T15:31:12.000Z",{"name":77,"slug":78,"count":79,"latest_published_at":80},"Science","science",232,"2026-11-13T12:00:40.000Z",{"name":82,"slug":24,"count":83,"latest_published_at":84},"Software",172,"2026-11-13T11:04:24.000Z",{"name":86,"slug":87,"count":88,"latest_published_at":89},"Startups","startups",160,"2026-11-12T17:31:47.000Z",{"name":91,"slug":92,"count":93,"latest_published_at":94},"Dev Tools","dev-tools",127,"2026-11-11T19:00:44.000Z",{"name":96,"slug":97,"count":98,"latest_published_at":99},"General","general",120,"2026-11-13T11:33:19.000Z",{"name":101,"slug":102,"count":103,"latest_published_at":104},"Gaming","gaming",109,"2026-11-13T10:00:00.000Z",{"name":106,"slug":107,"count":108,"latest_published_at":109},"Reviews","reviews",38,"2026-10-20T12:00:00.000Z",{"name":111,"slug":112,"count":113,"latest_published_at":114},"How-To","how-to",8,"2026-10-05T09:00:00.000Z"]