[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"branding":3,"analytics":7,"article-microsoft-points-to-health-check-component-in-outlook-outage":10,"sections":41},{"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":30,"tags":31,"sources":36,"feedback":40,"feedback_at":22,"cost_usd":40,"total_tokens":40},13000,"microsoft-points-to-health-check-component-in-outlook-outage","Microsoft Points to Health-Check Component in Outlook Outage","Microsoft says a server health-check component may explain the November 12 Outlook failures, but it has not found a recent change behind them.","Microsoft says the November 12 Outlook outage may originate from the component that checks whether its servers are working properly. The company framed it as a theory, not a confirmed root cause.\n\nIn a service health update, Microsoft said some servers went offline after failing automated health checks, the routine tests that tell a system whether a server can handle traffic. The company said the failed checks \"may originate from a specific component on the affected servers\" that runs them. Parts of its infrastructure were also under heavier load than usual across multiple regions, and Microsoft said that strain was likely adding to the connection problems.\n\nThe company is \"deploying a targeted change to bypass this component on a subset of servers\" to see whether that brings them back online. It has also taken steps to keep more servers from going out of service.\n\nThe scope grew over the day. Microsoft first flagged trouble reaching Exchange Online mailboxes in the Americas. Exchange Online is the service that stores and delivers email for many Outlook users. It later warned that the issue \"may affect Microsoft 365 service connectivity for users in any region.\" Around 1 p.m. ET, nearly 130,000 Outlook problem reports appeared on Downdetector, a site that tracks user-submitted outage complaints. Copilot users also reported problems, and Microsoft had separately flagged Teams trouble in North America under incident TM1550488.\n\nOutage investigations often begin with the most recent change to a system. Microsoft says it has not found one that coincided with the start of this outage, so that usual suspect is not yet implicated. The bypass is the real test: if it works on the subset of servers, the theory gains weight. If not, the company is back to asking why the checks failed in the first place.\n\nMicrosoft is posting updates under EX1550543 and MO1550821 in the Microsoft 365 admin center, and points users to its public service status page if the admin center is unreachable.","[\"microsoft\",\"outlook\",\"outage\",\"microsoft-365\"]","2026-11-12T21:15:24.000Z","2026-11-12T21:41:35.178Z","2026-11-12T21:41:37.708Z","published",null,[24],{"id":25,"reviewer":26,"round":27,"reason":28,"status":29},"editor-r1","editor",1,"Cut or tighten the 'Our read, not Microsoft's' paragraph, which speculates about how a misfiring checker would remove healthy servers and overload the rest, then hedges with 'though the company has not said it works this way'; also stop implying the failure hit 'so many servers at once' (the source gives no count) and soften the lead's 'started with' to match Microsoft's 'may originate from'.","resolved","software",[32,33,34,35],"microsoft","outlook","outage","microsoft-365",[37],{"name":38,"url":39},"Mashable","https:\u002F\u002Fmashable.com\u002Ftech\u002Fmicrosoft-outlook-outage-cause-revealed-nov-12-2026",0,{"sections":42},[43,48,53,58,63,68,73,78,82,87,92,97,102,107],{"name":44,"slug":45,"count":46,"latest_published_at":47},"AI","ai",7151,"2026-11-13T11:05:00.000Z",{"name":49,"slug":50,"count":51,"latest_published_at":52},"Security","security",1132,"2026-11-12T15:35:00.000Z",{"name":54,"slug":55,"count":56,"latest_published_at":57},"Deals","deals",653,"2026-11-13T11:52:26.000Z",{"name":59,"slug":60,"count":61,"latest_published_at":62},"Policy","policy",621,"2026-11-12T19:54:30.000Z",{"name":64,"slug":65,"count":66,"latest_published_at":67},"Consumer Tech","consumer-tech",370,"2026-11-12T17:00:00.000Z",{"name":69,"slug":70,"count":71,"latest_published_at":72},"Hardware","hardware",337,"2026-11-12T15:31:12.000Z",{"name":74,"slug":75,"count":76,"latest_published_at":77},"Science","science",232,"2026-11-13T12:00:40.000Z",{"name":79,"slug":30,"count":80,"latest_published_at":81},"Software",172,"2026-11-13T11:04:24.000Z",{"name":83,"slug":84,"count":85,"latest_published_at":86},"Startups","startups",160,"2026-11-12T17:31:47.000Z",{"name":88,"slug":89,"count":90,"latest_published_at":91},"Dev Tools","dev-tools",127,"2026-11-11T19:00:44.000Z",{"name":93,"slug":94,"count":95,"latest_published_at":96},"General","general",120,"2026-11-13T11:33:19.000Z",{"name":98,"slug":99,"count":100,"latest_published_at":101},"Gaming","gaming",109,"2026-11-13T10:00:00.000Z",{"name":103,"slug":104,"count":105,"latest_published_at":106},"Reviews","reviews",38,"2026-10-20T12:00:00.000Z",{"name":108,"slug":109,"count":110,"latest_published_at":111},"How-To","how-to",8,"2026-10-05T09:00:00.000Z"]