{"id":15002,"date":"2026-02-18T20:01:17","date_gmt":"2026-02-18T11:01:17","guid":{"rendered":"https:\/\/m365jp.net\/?p=15002"},"modified":"2026-02-18T20:02:36","modified_gmt":"2026-02-18T11:02:36","slug":"servicedegradation-cw1226324-microsoft-365-copilot-chat-users-email-messages-with-a-confidential-label-applied-are-being-incorrectly-processed-by-microsoft-365-copilot-chat-4","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-02-18-servicedegradation-cw1226324-microsoft-365-copilot-chat-users-email-messages-with-a-confidential-label-applied-are-being-incorrectly-processed-by-microsoft-365-copilot-chat-4","title":{"rendered":"[serviceDegradation] CW1226324 | Microsoft 365 Copilot Chat | Users’ email messages with a confidential label applied are being incorrectly processed by Microsoft 365 Copilot chat"},"content":{"rendered":"
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CW1226324 | Microsoft 365 Copilot Chat | Users’ email messages with a confidential label applied are being incorrectly processed by Microsoft 365 Copilot chat<\/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’ email messages with a confidential label applied are being incorrectly processed by Microsoft 365 Copilot chat.<\/td>\n<\/tr>\n
Last Updated<\/th>\n02\/18\/2026 10:14:27<\/td>\n<\/tr>\n
Start Time<\/th>\n01\/21\/2026 07:25:00<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Users’ email messages with a confidential label applied are being incorrectly processed by Microsoft 365 Copilot chat<\/p>\n

User impact: Users’ email messages with a confidential label applied are being incorrectly processed by Microsoft 365 Copilot chat.<\/p>\n

More info: The Microsoft 365 Copilot “work tab” Chat is summarizing email messages even though these email messages have a sensitivity label applied and a DLP policy is configured.<\/p>\n

Current status: We’re proceeding to monitor the deployment of the fix as it progresses and are reaching out to a subset of users to test for impact remediation. We expect to have a estimated time for completion by our next scheduled update.<\/p>\n

Scope of impact: Your organization is affected by this event, and users’ email messages with a confidential label applied are being incorrectly processed by Microsoft 365 Copilot chat. This section may be updated as our investigation continues.<\/p>\n

Start time: Wednesday, January 21, 2026, at 7:25 AM UTC<\/p>\n

Root cause: A code issue is allowing items in the sent items and draft folders to be picked up by Copilot even though confidential labels are set in place.<\/p>\n

Next update by: Wednesday, February 18, 2026, at 7:00 PM UTC<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb:\u6a5f\u5bc6\u30e9\u30d9\u30eb\u304c\u9069\u7528\u3055\u308c\u305f\u30e6\u30fc\u30b6\u30fc\u306e\u30e1\u30fc\u30eb\u30e1\u30c3\u30bb\u30fc\u30b8\u304cMicrosoft 365 Copilot\u30c1\u30e3\u30c3\u30c8\u3067\u8aa4\u3063\u3066\u51e6\u7406\u3055\u308c\u3066\u3044\u307e\u3059<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff:\u6a5f\u5bc6\u30e9\u30d9\u30eb\u304c\u9069\u7528\u3055\u308c\u305f\u30e6\u30fc\u30b6\u30fc\u306e\u30e1\u30fc\u30eb\u30e1\u30c3\u30bb\u30fc\u30b8\u304cMicrosoft 365 Copilot\u30c1\u30e3\u30c3\u30c8\u3067\u8aa4\u3063\u3066\u51e6\u7406\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u8a73\u7d30\u60c5\u5831:Microsoft 365 Copilot\u306e\u300c\u4ed5\u4e8b\u30bf\u30d6\u300d\u30c1\u30e3\u30c3\u30c8\u306f\u3001\u30bb\u30f3\u30b7\u30c6\u30a3\u30d6\u30e9\u30d9\u30eb\u304c\u9069\u7528\u3055\u308cDLP\u30dd\u30ea\u30b7\u30fc\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u30e1\u30fc\u30eb\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8981\u7d04\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

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\u5f71\u97ff\u7bc4\u56f2:\u8cb4\u7d44\u7e54\u306f\u3053\u306e\u30a4\u30d9\u30f3\u30c8\u306e\u5f71\u97ff\u3092\u53d7\u3051\u3066\u304a\u308a\u3001\u6a5f\u5bc6\u30e9\u30d9\u30eb\u304c\u4ed8\u3051\u3089\u308c\u305f\u30e6\u30fc\u30b6\u30fc\u306e\u30e1\u30fc\u30eb\u30e1\u30c3\u30bb\u30fc\u30b8\u304cMicrosoft 365 Copilot\u30c1\u30e3\u30c3\u30c8\u3067\u8aa4\u3063\u3066\u51e6\u7406\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u306f\u8abf\u67fb\u304c\u9032\u3080\u306b\u3064\u308c\u3066\u66f4\u65b0\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u958b\u59cb\u6642\u9593:2026\u5e741\u670821\u65e5\u6c34\u66dc\u65e5 7:25 UTC<\/p>\n

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\u6b21\u56de\u66f4\u65b0:2026\u5e742\u670818\u65e5\u6c34\u66dc\u65e5 \u5348\u5f8c7\u6642 UTC<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

CW1226324 | Microsoft 365 Copilot Chat | Users’ email messages with a confidential label applied are bei […]<\/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-15002","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/15002","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=15002"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/15002\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=15002"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=15002"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=15002"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}