{"id":15035,"date":"2026-02-19T18:01:04","date_gmt":"2026-02-19T09:01:04","guid":{"rendered":"https:\/\/m365jp.net\/?p=15035"},"modified":"2026-02-19T18:06:08","modified_gmt":"2026-02-19T09:06:08","slug":"servicedegradation-cw1226324-microsoft-365-copilot-chat-some-users-copilot-prompts-return-information-from-sent-and-draft-folder-messages-with-copilot-dlp-policies-configured","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-02-19-servicedegradation-cw1226324-microsoft-365-copilot-chat-some-users-copilot-prompts-return-information-from-sent-and-draft-folder-messages-with-copilot-dlp-policies-configured","title":{"rendered":"[serviceDegradation] CW1226324 | Microsoft 365 Copilot Chat | Some users’ Copilot prompts return information from Sent and Draft folder messages with Copilot DLP policies configured"},"content":{"rendered":"
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CW1226324 | Microsoft 365 Copilot Chat | Some users’ Copilot prompts return information from Sent and Draft folder messages with Copilot DLP policies configured<\/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’ Copilot prompts return information from Sent and Draft folder messages with Copilot DLP policies configured.<\/td>\n<\/tr>\n
Last Updated<\/th>\n02\/19\/2026 08:33:57<\/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: Some users’ Copilot prompts return information from Sent and Draft folder messages with Copilot DLP policies configured<\/p>\n

User impact: Users’ Copilot prompts return information from Sent and Draft folder messages with Copilot DLP policies configured.<\/p>\n

More info: This issue is specific to Exchange Online email messages that are in the Sent Items and Drafts folders. The Microsoft 365 Copilot “work tab” Chat may process these email messages for the user that owns them even though these email messages have a sensitivity label applied and a Copilot DLP policy is configured.<\/p>\n

Current status: We’ve received feedback from some affected users that the deployment fix has resolved impact. We’re monitoring the fix as it fully saturates in the remaining affected environments, and we expect full remediation by our next scheduled update.<\/p>\n

Scope of impact: Users leveraging Microsoft 365 Copilot Chat may notice that email messages in their Drafts or Sent Items folder may be referenced in prompt responses even though these messages may have a sensitivity label applied and a Copilot DLP policy configured. 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: Tuesday, February 24, 2026, at 7:30 AM UTC<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb:\u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306eCopilot\u30d7\u30ed\u30f3\u30d7\u30c8\u306f\u3001Copilot\u306eDLP\u30dd\u30ea\u30b7\u30fc\u3092\u8a2d\u5b9a\u3057\u305f\u9001\u4fe1\u6e08\u307f\u304a\u3088\u3073\u30c9\u30e9\u30d5\u30c8\u30d5\u30a9\u30eb\u30c0\u30e1\u30c3\u30bb\u30fc\u30b8\u304b\u3089\u60c5\u5831\u3092\u8fd4\u3057\u307e\u3059<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff:\u30e6\u30fc\u30b6\u30fc\u306eCopilot\u306f\u3001Copilot DLP\u30dd\u30ea\u30b7\u30fc\u3092\u8a2d\u5b9a\u3057\u305f\u4e0a\u3067\u9001\u4fe1\u6e08\u307f\u304a\u3088\u3073\u30c9\u30e9\u30d5\u30c8\u30d5\u30a9\u30eb\u30c0\u304b\u3089\u60c5\u5831\u3092\u8fd4\u9001\u3057\u307e\u3059\u3002<\/p>\n

\u8a73\u7d30\u60c5\u5831:\u3053\u306e\u554f\u984c\u306f\u3001\u9001\u4fe1\u6e08\u307f\u30a2\u30a4\u30c6\u30e0\u3068\u30c9\u30e9\u30d5\u30c8\u30d5\u30a9\u30eb\u30c0\u306b\u3042\u308bExchange Online\u306e\u30e1\u30fc\u30eb\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u7279\u6709\u306e\u3082\u306e\u3067\u3059\u3002Microsoft 365\u306eCopilot\u300c\u30ef\u30fc\u30af\u30bf\u30d6\u300d\u30c1\u30e3\u30c3\u30c8\u306f\u3001\u3053\u308c\u3089\u306e\u30e1\u30fc\u30eb\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u30bb\u30f3\u30b7\u30c6\u30a3\u30d6\u30e9\u30d9\u30eb\u304c\u9069\u7528\u3055\u308c\u3001Copilot\u306eDLP\u30dd\u30ea\u30b7\u30fc\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u3066\u3082\u3001\u6240\u6709\u8005\u306e\u30e1\u30fc\u30eb\u3092\u51e6\u7406\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u73fe\u72b6:\u4e00\u90e8\u306e\u5f71\u97ff\u3092\u53d7\u3051\u305f\u30e6\u30fc\u30b6\u30fc\u304b\u3089\u3001\u30c7\u30d7\u30ed\u30a4\u30e1\u30f3\u30c8\u4fee\u6b63\u3067\u5f71\u97ff\u304c\u89e3\u6d88\u3055\u308c\u305f\u3068\u306e\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u3092\u53d7\u3051\u53d6\u308a\u307e\u3057\u305f\u3002\u4fee\u6b63\u304c\u5f71\u97ff\u3092\u53d7\u3051\u305f\u74b0\u5883\u3067\u5b8c\u5168\u306b\u6d78\u900f\u3059\u308b\u307e\u3067\u76e3\u8996\u3057\u3066\u304a\u308a\u3001\u6b21\u56de\u306e\u4e88\u5b9a\u3055\u308c\u305f\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u307e\u3067\u306b\u5b8c\u5168\u306a\u4fee\u5fa9\u304c\u5b8c\u4e86\u3059\u308b\u3068\u671f\u5f85\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u5f71\u97ff\u7bc4\u56f2:Microsoft 365 Copilot Chat\u3092\u5229\u7528\u3059\u308b\u30e6\u30fc\u30b6\u30fc\u306f\u3001Drafts\u3084Sent Items\u30d5\u30a9\u30eb\u30c0\u5185\u306e\u30e1\u30fc\u30eb\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u3001\u30bb\u30f3\u30b7\u30c6\u30a3\u30d6\u30e9\u30d9\u30eb\u304c\u9069\u7528\u3055\u308cCopilot DLP\u30dd\u30ea\u30b7\u30fc\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u3066\u3082\u3001\u30d7\u30ed\u30f3\u30d7\u30c8\u30ec\u30b9\u30dd\u30f3\u30b9\u3067\u53c2\u7167\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u306b\u6c17\u3065\u304f\u304b\u3082\u3057\u308c\u307e\u305b\u3093\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\u670824\u65e5\u706b\u66dc\u65e5 \u5348\u524d7\u664230\u5206 UTC<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

CW1226324 | Microsoft 365 Copilot Chat | Some users’ Copilot prompts return information from Sent and Dr […]<\/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-15035","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/15035","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=15035"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/15035\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=15035"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=15035"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=15035"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}