{"id":18495,"date":"2026-09-12T12:01:30","date_gmt":"2026-09-12T03:01:30","guid":{"rendered":"https:\/\/m365jp.net\/?p=18495"},"modified":"2026-09-12T12:06:53","modified_gmt":"2026-09-12T03:06:53","slug":"servicedegradation-cw1470765-microsoft-365-copilot-chat-some-users-exchange-online-email-messages-may-not-be-retrieved-when-prompting-microsoft-365-copilot-chat-4","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-09-12-servicedegradation-cw1470765-microsoft-365-copilot-chat-some-users-exchange-online-email-messages-may-not-be-retrieved-when-prompting-microsoft-365-copilot-chat-4","title":{"rendered":"[serviceDegradation] CW1470765 | Microsoft 365 Copilot Chat | Some users’ Exchange Online email messages may not be retrieved when prompting Microsoft 365 Copilot Chat"},"content":{"rendered":"
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CW1470765 | Microsoft 365 Copilot Chat | Some users’ Exchange Online email messages may not be retrieved when prompting 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>\nincident<\/td>\n<\/tr>\n
User Impact<\/th>\nUsers’ Exchange Online email messages may not be retrieved when prompting Copilot Chat.<\/td>\n<\/tr>\n
Last Updated<\/th>\n09\/12\/2026 02:12:04<\/td>\n<\/tr>\n
Start Time<\/th>\n07\/22\/2026 22:07:00<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Some users’ Exchange Online email messages may not be retrieved when prompting Microsoft 365 Copilot Chat <\/p>\n

User impact: Users’ Exchange Online email messages may not be retrieved when prompting Copilot Chat. <\/p>\n

More info: Some Exchange Online email messages between July 22, 2026, and today may not be retrieved by Copilot Chat when prompted. While we index the affected email messages to our semantic index model, users can prompt Copilot Chat using exact wording to retrieve the email messages. <\/p>\n

Current status: We’ve validated our secondary fix and begun the first 10 percent of deployment. We’ll monitor this initial deployment process in order to determine the estimated timeline for full remediation and provide those details as soon as they become available. <\/p>\n

Scope of impact: Some users that are attempting to prompt Copilot Chat to retrieve details from Exchange Online email messages between July 22, 2026, and today may be impacted. This information may be updated as our investigation continues. <\/p>\n

Start time: Wednesday, July 22, 2026, at 10:07 PM UTC <\/p>\n

Root cause: A service change introduced a misconfiguration that prevented Exchange Online email messages between July 22, 2026, and today from being indexed by our semantic index model, causing impact. <\/p>\n

Next update by: Saturday, September 12, 2026, at 5:00 PM UTC<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb:\u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306eExchange Online\u30e1\u30fc\u30eb\u306f\u3001Microsoft 365 Copilot\u30c1\u30e3\u30c3\u30c8\u3092\u4fc3\u3059\u969b\u306b\u53d6\u5f97\u3067\u304d\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059 <\/p>\n

\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff:Copilot Chat\u3092\u4fc3\u3059\u969b\u306b\u30e6\u30fc\u30b6\u30fc\u306eExchange Online\u30e1\u30fc\u30eb\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u53d6\u5f97\u3067\u304d\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002 <\/p>\n

\u8a73\u7d30\u60c5\u5831:2026\u5e747\u670822\u65e5\u304b\u3089\u672c\u65e5\u307e\u3067\u306e\u4e00\u90e8\u306eExchange Online\u30e1\u30fc\u30eb\u306f\u3001Copilot Chat\u3067\u691c\u7d22\u3055\u308c\u306a\u3044\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002\u5f71\u97ff\u3092\u53d7\u3051\u305f\u30e1\u30fc\u30eb\u306f\u30bb\u30de\u30f3\u30c6\u30a3\u30c3\u30af\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30e2\u30c7\u30eb\u3067\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5316\u3057\u307e\u3059\u304c\u3001\u30e6\u30fc\u30b6\u30fc\u306f\u6b63\u78ba\u306a\u6587\u8a00\u3067Copilot Chat\u306b\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002 <\/p>\n

\u73fe\u72b6:\u4e8c\u6b21\u7684\u306a\u4fee\u6b63\u3092\u691c\u8a3c\u3057\u3001\u6700\u521d\u306e10%\u306e\u5c55\u958b\u3092\u958b\u59cb\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u521d\u671f\u5c55\u958b\u30d7\u30ed\u30bb\u30b9\u3092\u76e3\u8996\u3057\u3001\u5b8c\u5168\u306a\u4fee\u5fa9\u306e\u63a8\u5b9a\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u3092\u6c7a\u5b9a\u3057\u3001\u8a73\u7d30\u304c\u5165\u624b\u6b21\u7b2c\u8fc5\u901f\u306b\u63d0\u4f9b\u3057\u307e\u3059\u3002 <\/p>\n

\u5f71\u97ff\u7bc4\u56f2:2026\u5e747\u670822\u65e5\u304b\u3089\u672c\u65e5\u307e\u3067\u306bExchange Online\u306e\u30e1\u30fc\u30eb\u30e1\u30c3\u30bb\u30fc\u30b8\u304b\u3089\u8a73\u7d30\u3092\u53d6\u5f97\u3059\u308b\u3088\u3046Copilot Chat\u306b\u4fc3\u3059\u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u5f71\u97ff\u3092\u53d7\u3051\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u8abf\u67fb\u304c\u9032\u3080\u306b\u3064\u308c\u3066\u3001\u3053\u306e\u60c5\u5831\u306f\u66f4\u65b0\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 <\/p>\n

\u958b\u59cb\u6642\u9593:2026\u5e747\u670822\u65e5\u6c34\u66dc\u65e5 22:07 UTC <\/p>\n

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\u6b21\u56de\u66f4\u65b0:2026\u5e749\u670812\u65e5\u571f\u66dc\u65e5 \u5348\u5f8c5:00 UTC<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

CW1470765 | Microsoft 365 Copilot Chat | Some users’ Exchange Online email messages may not be retrieved […]<\/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-18495","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/18495","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=18495"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/18495\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=18495"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=18495"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=18495"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}