--- title: Microsoft 365 outage drags on, but things are improving description: Microsoft's multi-day Microsoft 365 outage, caused by a misconfiguration in a core authentication component, is entering its second day with partial recovery... canonical: https://daily.dev/posts/microsoft-365-outage-drags-on-but-things-are-improving-tkvddo9us twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Microsoft 365 outage drags on, but things are improving | daily.dev og:description: Microsoft's multi-day Microsoft 365 outage, caused by a misconfiguration in a core authentication component, is entering its second day with partial recovery... og:url: https://daily.dev/posts/microsoft-365-outage-drags-on-but-things-are-improving-tkvddo9us og:image: https://api.daily.dev/og/posts/tkvdDO9Us.png og:image:alt: Microsoft 365 outage drags on, but things are improving og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Microsoft 365 outage drags on, but things are improving **[TechCrunch](https://daily.dev/sources/tc)** · 2 min read · 3 upvotes · 0 comments ## Summary Microsoft's multi-day Microsoft 365 outage, caused by a misconfiguration in a core authentication component, is entering its second day with partial recovery underway. Outlook, SharePoint, Copilot, Teams, Purview, Defender XDR, the Microsoft 365 Admin Center, and Universal Print were all affected. Microsoft says telemetry indicates improving service availability and mail flow, with search functionality also recovering, but the company has not declared the incident fully resolved and is now in an extended monitoring phase. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What caused the multi-day Microsoft 365 and Outlook outage? A misconfiguration in a core authentication component used by multiple Microsoft 365 services caused the outage. The issue prevented authentication components from deploying as expected to a portion of infrastructure, leading to email delays, failures, and authentication problems in Outlook, plus disruptions to SharePoint, Copilot, Teams, Purview, Defender XDR, the Admin Center, and Universal Print. _Sysadmins tracking major cloud outages can follow incident breakdowns like this on daily.dev._ ### Which Microsoft 365 services were affected by the recent authentication outage besides Outlook? Beyond Outlook, the outage affected SharePoint, Copilot, Teams, Purview, Defender XDR, the Microsoft 365 Admin Center, and Universal Print. Microsoft's status page attributed the disruption to a core authentication configuration issue shared across these services rather than a problem isolated to email alone. _Teams evaluating dependency risk across Microsoft 365 apps can follow outage patterns via daily.dev._ ## Similar posts on daily.dev - [Microsoft 365 hit by outage, preventing access to emails and files](https://daily.dev/posts/microsoft-365-hit-by-outage-preventing-access-to-emails-and-files-irywo2f8j) · TechCrunch · 0 upvotes · 0 comments - [Microsoft 365 outage affects Teams, SharePoint and other services](https://daily.dev/posts/microsoft-365-outage-affects-teams-sharepoint-and-other-services-gi3tmhotf) · BleepingComputer · 0 upvotes · 0 comments - [Microsoft confirms outage affecting search in Microsoft 365 apps](https://daily.dev/posts/microsoft-confirms-outage-affecting-search-in-microsoft-365-apps-kbc6i6lst) · BleepingComputer · 0 upvotes · 0 comments - [Microsoft tests fix for latest hours-long Outlook outage](https://daily.dev/posts/microsoft-tests-fix-for-latest-hours-long-outlook-outage-p9tn5amyy) · TechCrunch · 0 upvotes · 1 comments - [Microsoft blames massive Microsoft 365 outage on maintenance bug](https://daily.dev/posts/microsoft-blames-massive-microsoft-365-outage-on-maintenance-bug-6v6fhc5ky) · BleepingComputer · 1 upvotes · 0 comments --- Tags: [#microsoft](https://daily.dev/tags/microsoft) [View this post on daily.dev](https://daily.dev/posts/microsoft-365-outage-drags-on-but-things-are-improving-tkvddo9us) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Microsoft 365 outage drags on, but things are improving","url":"https://daily.dev/posts/microsoft-365-outage-drags-on-but-things-are-improving-tkvddo9us","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/microsoft-365-outage-drags-on-but-things-are-improving-tkvddo9us"},"datePublished":"2026-09-01T15:27:36.168Z","dateModified":"2026-09-14T07:45:32.028Z","description":"Microsoft's multi-day Microsoft 365 outage, caused by a misconfiguration in a core authentication component, is entering its second day with partial recovery...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/31d2309a48509327ae04661cde841506?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/31d2309a48509327ae04661cde841506?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"TechCrunch","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"TechCrunch","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/tc","url":"https://daily.dev/sources/tc"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/microsoft-365-outage-drags-on-but-things-are-improving-tkvddo9us","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":3},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"microsoft","timeRequired":"PT2M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"TechCrunch","item":"https://daily.dev/sources/tc"},{"@type":"ListItem","position":3,"name":"Microsoft 365 outage drags on, but things are improving"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/microsoft-365-outage-drags-on-but-things-are-improving-tkvddo9us#faq","mainEntity":[{"@type":"Question","name":"What caused the multi-day Microsoft 365 and Outlook outage?","acceptedAnswer":{"@type":"Answer","text":"A misconfiguration in a core authentication component used by multiple Microsoft 365 services caused the outage. 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