{"id":18480,"date":"2026-09-12T04:01:43","date_gmt":"2026-09-11T19:01:43","guid":{"rendered":"https:\/\/m365jp.net\/?p=18480"},"modified":"2026-09-12T04:01:51","modified_gmt":"2026-09-11T19:01:51","slug":"investigating-cw1470765-microsoft-365-copilot-chat-some-users-exchange-online-email-messages-may-not-be-retrieved-when-prompting-microsoft-365-copilot-chat-2","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-09-12-investigating-cw1470765-microsoft-365-copilot-chat-some-users-exchange-online-email-messages-may-not-be-retrieved-when-prompting-microsoft-365-copilot-chat-2","title":{"rendered":"[investigating] 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>\ninvestigating<\/td>\n<\/tr>\n
Classification<\/th>\nadvisory<\/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\/11\/2026 18:20:18<\/td>\n<\/tr>\n
Start Time<\/th>\n09\/11\/2026 17:44:02<\/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 identified that 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. We’re developing multiple fixes to ensure new email messages would be indexed and to index the email messages that were missed during the impact window. <\/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. <\/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: Friday, September 11, 2026, at 7:30 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

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

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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-18480","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/18480","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=18480"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/18480\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=18480"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=18480"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=18480"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}