{"id":15089,"date":"2026-02-24T04:01:18","date_gmt":"2026-02-23T19:01:18","guid":{"rendered":"https:\/\/m365jp.net\/?p=15089"},"modified":"2026-02-24T04:01:30","modified_gmt":"2026-02-23T19:01:30","slug":"investigationsuspended-mo1237461-microsoft-365-suite-users-may-have-experienced-issues-when-trying-to-access-services-that-required-multi-factor-authentication-mfa","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-02-24-investigationsuspended-mo1237461-microsoft-365-suite-users-may-have-experienced-issues-when-trying-to-access-services-that-required-multi-factor-authentication-mfa","title":{"rendered":"[investigationSuspended] MO1237461 | Microsoft 365 suite | Users may have experienced issues when trying to access services that required Multi-Factor Authentication (MFA)"},"content":{"rendered":"
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MO1237461 | Microsoft 365 suite | Users may have experienced issues when trying to access services that required Multi-Factor Authentication (MFA)<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\n\n\n\n\n\n\n\n\n\n
Status<\/th>\ninvestigationSuspended<\/td>\n<\/tr>\n
Classification<\/th>\nincident<\/td>\n<\/tr>\n
User Impact<\/th>\nSome users may have experienced issues accessing Microsoft 365 services, particularly during sign\u2011in or authentication.<\/td>\n<\/tr>\n
Last Updated<\/th>\n02\/23\/2026 18:24:15<\/td>\n<\/tr>\n
Start Time<\/th>\n02\/23\/2026 14:00:00<\/td>\n<\/tr>\n
End Time<\/th>\n02\/23\/2026 16:38:00<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Users may experience issues when trying to access services that require Multi-Factor Authentication (MFA)<\/p>\n

User impact: Some users may experience issues accessing Microsoft 365 services, particularly during sign\u2011in or authentication.<\/p>\n

More Info: Customers in North America who leverage Cisco\/Duo in their MFA sign-in flow were impacted. <\/p>\n

Final status: We’ve confirmed that the reported impact has been mitigated. Our investigation determined that Microsoft services were operating as expected throughout the incident. We\u2019ve confirmed with a third\u2011party authentication provider (Cisco\/Duo) that a fix deployed within their environment has resolved the issue, and we\u2019re seeing successful authentication attempts.<\/p>\n

Scope of impact: This issue may have affected any user within your organization leveraging MFA for sign-in. We’ve confirmed the following region(s) were impacted by this issue: North America. Additional impacted region(s) may be included as our investigation continues.<\/p>\n

Start time: Monday, February 23, 2026, at 2:00 PM UTC<\/p>\n

End time: Monday, February 23, 2026, at 4:38 PM UTC<\/p>\n

Preliminary root cause: A third\u2011party authentication provider experienced an issue within their environment, which resulted in authentication failures when users attempted to sign in to Microsoft services that depend on that provider.<\/p>\n

Next steps: This incident is considered resolved by a third-party without Microsoft action. We\u2019ll continue to monitor service telemetry to ensure ongoing stability.<\/p>\n

This is the final update for the event.<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb:\u591a\u8981\u7d20\u8a8d\u8a3c(MFA)\u304c\u5fc5\u8981\u306a\u30b5\u30fc\u30d3\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3059\u308b\u969b\u306b\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u554f\u984c\u3092\u7d4c\u9a13\u3059\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059<\/p>\n

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MO1237461 | Microsoft 365 suite | Users may have experienced issues when trying to access services that requir […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-15089","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/15089","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/comments?post=15089"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/15089\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=15089"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=15089"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=15089"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}