{"id":13472,"date":"2025-10-28T05:00:48","date_gmt":"2025-10-27T20:00:48","guid":{"rendered":"https:\/\/m365jp.net\/?p=13472"},"modified":"2025-10-28T05:01:11","modified_gmt":"2025-10-27T20:01:11","slug":"servicerestored-ex1173828-exchange-online-users-may-be-unexpectedly-signed-out-from-outlook-on-the-web-when-accessing-shared-mailboxes","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2025-10-28-servicerestored-ex1173828-exchange-online-users-may-be-unexpectedly-signed-out-from-outlook-on-the-web-when-accessing-shared-mailboxes","title":{"rendered":"[serviceRestored] EX1173828 | Exchange Online | Users may be unexpectedly signed out from Outlook on the web when accessing shared mailboxes"},"content":{"rendered":"
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EX1173828 | Exchange Online | Users may be unexpectedly signed out from Outlook on the web when accessing shared mailboxes<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\n\n\n\n\n\n\n\n\n\n
Status<\/th>\nserviceRestored<\/td>\n<\/tr>\n
Classification<\/th>\nadvisory<\/td>\n<\/tr>\n
User Impact<\/th>\nUsers may have been unexpectedly signed out from Outlook on the web when accessing shared mailboxes.<\/td>\n<\/tr>\n
Last Updated<\/th>\n10\/27\/2025 19:55:58<\/td>\n<\/tr>\n
Start Time<\/th>\n10\/14\/2025 09:18:00<\/td>\n<\/tr>\n
End Time<\/th>\n10\/21\/2025 02:00:00<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Users may be unexpectedly signed out from Outlook on the web when accessing shared mailboxes<\/p>\n

User impact: Users may have been unexpectedly signed out from Outlook on the web when accessing shared mailboxes.<\/p>\n

Final status: We’ve determined that a recent package intended to update the appearance of the Outlook suite header contained a bug that created this impact. A new version of this update, without the bug, was then implemented to update the suite header without any residual impact.<\/p>\n

Scope of impact: This issue could have potentially affected any user when accessing shared mailboxes from Outlook on the web.<\/p>\n

Start time: Tuesday, October 14, 2025, at 9:18 AM UTC<\/p>\n

End time: Tuesday, October 21, 2025, at 2:00 AM UTC<\/p>\n

Root cause: A bug contained in a recent package intended to update the appearance of the Outlook suite header created this impact.<\/p>\n

Next steps:
– We’re reviewing the bug in a recent package intended to update the appearance of the Outlook suite header to better understand what led to the error that resulted in impact and prevent similar future occurrences.<\/p>\n

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

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb: \u5171\u6709\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u304d\u306b\u3001\u30e6\u30fc\u30b6\u30fc\u304c Outlook on the web \u304b\u3089\u4e88\u671f\u305b\u305a\u30b5\u30a4\u30f3\u30a2\u30a6\u30c8\u3059\u308b\u3053\u3068\u304c\u3042\u308b<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff: \u30e6\u30fc\u30b6\u30fc\u304c\u5171\u6709\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u304d\u306b\u3001Outlook on the web \u304b\u3089\u4e88\u671f\u305b\u305a\u30b5\u30a4\u30f3\u30a2\u30a6\u30c8\u3057\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u6700\u7d42\u72b6\u614b: Outlook \u30b9\u30a4\u30fc\u30c8 \u30d8\u30c3\u30c0\u30fc\u306e\u5916\u89b3\u3092\u66f4\u65b0\u3059\u308b\u3053\u3068\u3092\u76ee\u7684\u3068\u3057\u305f\u6700\u8fd1\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u306b\u3001\u3053\u306e\u5f71\u97ff\u3092\u5f15\u304d\u8d77\u3053\u3059\u30d0\u30b0\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u5224\u660e\u3057\u307e\u3057\u305f\u3002\u305d\u306e\u5f8c\u3001\u30d0\u30b0\u306e\u306a\u3044\u3053\u306e\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u65b0\u3057\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u5b9f\u88c5\u3055\u308c\u3001\u6b8b\u7559\u5f71\u97ff\u306a\u3057\u306b\u30b9\u30a4\u30fc\u30c8\u30d8\u30c3\u30c0\u30fc\u304c\u66f4\u65b0\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n

\u5f71\u97ff\u306e\u7bc4\u56f2: \u3053\u306e\u554f\u984c\u306f\u3001Outlook on the web\u304b\u3089\u5171\u6709\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u304d\u306b\u3001\u3059\u3079\u3066\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u5f71\u97ff\u3092\u53ca\u307c\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u958b\u59cb\u6642\u9593: 2025 \u5e74 10 \u6708 14 \u65e5\u706b\u66dc\u65e5\u5348\u524d 9 \u6642 18 \u5206 UTC<\/p>\n

\u7d42\u4e86\u6642\u523b: 2025 \u5e74 10 \u6708 21 \u65e5\u706b\u66dc\u65e5\u5348\u524d 2:00 UTC<\/p>\n

\u6839\u672c\u539f\u56e0: Outlook \u30b9\u30a4\u30fc\u30c8 \u30d8\u30c3\u30c0\u30fc\u306e\u5916\u89b3\u3092\u66f4\u65b0\u3059\u308b\u3053\u3068\u3092\u76ee\u7684\u3068\u3057\u305f\u6700\u8fd1\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u306b\u542b\u307e\u308c\u308b\u30d0\u30b0\u304c\u3001\u3053\u306e\u5f71\u97ff\u3092\u5f15\u304d\u8d77\u3053\u3057\u307e\u3057\u305f\u3002<\/p>\n

\u6b21\u306e\u30b9\u30c6\u30c3\u30d7:
– Outlook \u30b9\u30a4\u30fc\u30c8 \u30d8\u30c3\u30c0\u30fc\u306e\u5916\u89b3\u3092\u66f4\u65b0\u3057\u3066\u3001\u5f71\u97ff\u3092\u3082\u305f\u3089\u3057\u305f\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u3092\u3088\u308a\u3088\u304f\u7406\u89e3\u3057\u3001\u5c06\u6765\u306e\u540c\u69d8\u306e\u767a\u751f\u3092\u9632\u3050\u3053\u3068\u3092\u76ee\u7684\u3068\u3057\u305f\u6700\u8fd1\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u30d0\u30b0\u3092\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u30a4\u30d9\u30f3\u30c8\u306e\u6700\u7d42\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3067\u3059\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

EX1173828 | Exchange Online | Users may be unexpectedly signed out from Outlook on the web when accessing shar […]<\/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-13472","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/13472","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=13472"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/13472\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=13472"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=13472"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=13472"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}