{"id":18327,"date":"2026-09-03T19:01:13","date_gmt":"2026-09-03T10:01:13","guid":{"rendered":"https:\/\/m365jp.net\/?p=18327"},"modified":"2026-09-03T19:06:48","modified_gmt":"2026-09-03T10:06:48","slug":"servicedegradation-op1454727-microsoft-365-apps-users-may-be-unable-to-sign-in-to-onenote-using-ios-devices-4","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-09-03-servicedegradation-op1454727-microsoft-365-apps-users-may-be-unable-to-sign-in-to-onenote-using-ios-devices-4","title":{"rendered":"[serviceDegradation] OP1454727 | Microsoft 365 apps | Users may be unable to sign in to OneNote using iOS devices"},"content":{"rendered":"
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OP1454727 | Microsoft 365 apps | Users may be unable to sign in to OneNote using iOS devices<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\n\n\n\n\n\n\n\n\n\n
Status<\/th>\nserviceDegradation<\/td>\n<\/tr>\n
Classification<\/th>\nadvisory<\/td>\n<\/tr>\n
User Impact<\/th>\nUsers may be unable to sign in to OneNote using iOS devices.<\/td>\n<\/tr>\n
Last Updated<\/th>\n09\/03\/2026 09:55:10<\/td>\n<\/tr>\n
Start Time<\/th>\n08\/14\/2026 11:51:32<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Users may be unable to sign in to OneNote using iOS devices <\/p>\n

User impact: Users may be unable to sign in to OneNote using iOS devices. <\/p>\n

More info: Impact is specific to users with OneNote build 16.112.717.0 or higher.<\/p>\n

Whilst we work on remediation, impacted users may be able to utilize OneNote on the web or remove Authenticator so that authentication falls back to the in-app webview. Users may also be able to sign in to any other Microsoft 365 apps first (e.g. PowerPoint), then attempt to sign in again in OneNote. <\/p>\n

Current status: We’ve completed the validation of our fix in our internal testing environment and are preparing it for deployment, which should complete by our next scheduled update. Additionally, we’ve received confirmation from a subset of users who reported the issue that the fix resolves impact. <\/p>\n

Scope of impact: Any user attempting to sign in to OneNote build 16.112.717.0 or higher using iOS devices is impacted. This information may be updated as our investigation continues. <\/p>\n

Start time: Monday, July 20, 2026, at 4:36 AM UTC <\/p>\n

Root cause: A code change included in OneNote builds 16.112.717.0 and above, designed to change how authentication requests are routed, introduced an issue with OneNote iOS Authenticator broker sign-in and is causing impact. <\/p>\n

Next update by: Thursday, September 17, 2026, at 10:00 AM UTC<\/td>\n<\/tr>\n

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\u958b\u59cb\u6642\u9593:2026\u5e747\u670820\u65e5(\u6708)\u5348\u524d4\u664236\u5206(UTC) <\/p>\n

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OP1454727 | Microsoft 365 apps | Users may be unable to sign in to OneNote using iOS devices Status serviceDeg […]<\/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-18327","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/18327","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=18327"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/18327\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=18327"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=18327"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=18327"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}