{"id":14485,"date":"2026-01-13T19:00:59","date_gmt":"2026-01-13T10:00:59","guid":{"rendered":"https:\/\/m365jp.net\/?p=14485"},"modified":"2026-01-13T19:03:03","modified_gmt":"2026-01-13T10:03:03","slug":"servicedegradation-mo1213801-microsoft-365-suite-users-may-be-unable-to-access-shared-microsoft-to-do-lists-9","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-01-13-servicedegradation-mo1213801-microsoft-365-suite-users-may-be-unable-to-access-shared-microsoft-to-do-lists-9","title":{"rendered":"[serviceDegradation] MO1213801 | Microsoft 365 suite | Users may be unable to access shared Microsoft To Do lists"},"content":{"rendered":"
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MO1213801 | Microsoft 365 suite | Users may be unable to access shared Microsoft To Do lists<\/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 access shared Microsoft To Do lists.<\/td>\n<\/tr>\n
Last Updated<\/th>\n01\/13\/2026 09:26:06<\/td>\n<\/tr>\n
Start Time<\/th>\n12\/29\/2025 20:00:00<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Users may be unable to access shared Microsoft To Do lists<\/p>\n

User impact: Users may be unable to access shared Microsoft To Do lists.<\/p>\n

More info: Users may also be unable to open shared To Do list invitation links.<\/p>\n

Current status: We\u2019ve identified that a small number of system processes are running more slowly than expected, which is temporarily delaying the reversion of the change. The reversion has now been successfully completed for approximately 93% of the affected environments. We\u2019ll provide an updated completion timeline as soon as it\u2019s available.<\/p>\n

Scope of impact: This issue may potentially impact any user attempting to access shared Microsoft To Do lists.<\/p>\n

Start time: Monday, December 29, 2025, at 8:00 PM UTC<\/p>\n

Root cause: A recent change to add optimizations when sharing To Do lists introduced a misconfiguration which is resulting in impact.<\/p>\n

Next update by: Wednesday, January 14, 2026, at 3:30 PM UTC<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb:\u30e6\u30fc\u30b6\u30fc\u306f\u5171\u6709\u3055\u308c\u305fMicrosoft\u306eTo Do\u30ea\u30b9\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059<\/p>\n

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\u73fe\u72b6:\u4e00\u90e8\u306e\u30b7\u30b9\u30c6\u30e0\u30d7\u30ed\u30bb\u30b9\u304c\u4e88\u60f3\u3088\u308a\u9045\u304f\u52d5\u4f5c\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u7279\u5b9a\u3057\u3001\u5909\u66f4\u306e\u30ea\u30d0\u30fc\u30c8\u304c\u4e00\u6642\u7684\u306b\u9045\u308c\u3066\u3044\u307e\u3059\u3002\u73fe\u5728\u3001\u5f71\u97ff\u3092\u53d7\u3051\u305f\u74b0\u5883\u306e\u7d0493%\u3067\u56de\u5fa9\u304c\u6210\u529f\u88cf\u306b\u5b8c\u4e86\u3057\u3066\u3044\u307e\u3059\u3002\u5b8c\u4e86\u306e\u6700\u65b0\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u306f\u3001\u5165\u624b\u6b21\u7b2c\u3059\u3050\u306b\u304a\u77e5\u3089\u305b\u3057\u307e\u3059\u3002<\/p>\n

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\u958b\u59cb\u6642\u9593:2025\u5e7412\u670829\u65e5(\u6708)\u5348\u5f8c8\u6642(UTC)<\/p>\n

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