{"id":17988,"date":"2026-08-22T03:01:07","date_gmt":"2026-08-21T18:01:07","guid":{"rendered":"https:\/\/m365jp.net\/?p=17988"},"modified":"2026-08-22T03:10:25","modified_gmt":"2026-08-21T18:10:25","slug":"servicedegradation-op1454727-microsoft-365-apps-users-may-be-unable-to-sign-in-to-onenote-using-ios-devices","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-08-22-servicedegradation-op1454727-microsoft-365-apps-users-may-be-unable-to-sign-in-to-onenote-using-ios-devices","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>\n08\/21\/2026 17:49:52<\/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: Our fix deployment is taking longer than anticipated but is ongoing. We’re continuing to monitor as it progresses to establish a completion timeline.<\/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.<\/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: Friday, August 21, 2026, at 4:00 AM UTC<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb:\u30e6\u30fc\u30b6\u30fc\u306fiOS\u30c7\u30d0\u30a4\u30b9\u304b\u3089OneNote\u306b\u30b5\u30a4\u30f3\u30a4\u30f3\u3067\u304d\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059<\/p>\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-17988","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/17988","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=17988"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/17988\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=17988"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=17988"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=17988"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}