{"id":16818,"date":"2026-06-12T08:01:04","date_gmt":"2026-06-11T23:01:04","guid":{"rendered":"https:\/\/m365jp.net\/?p=16818"},"modified":"2026-06-12T08:03:34","modified_gmt":"2026-06-11T23:03:34","slug":"servicerestored-mo1387691-microsoft-365-suite-users-are-unable-to-access-microsoft-365-copilot-chat-or-portal-office-com","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-06-12-servicerestored-mo1387691-microsoft-365-suite-users-are-unable-to-access-microsoft-365-copilot-chat-or-portal-office-com","title":{"rendered":"[serviceRestored] MO1387691 | Microsoft 365 suite | Users are unable to access Microsoft 365 Copilot Chat or portal.office.com"},"content":{"rendered":"
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MO1387691 | Microsoft 365 suite | Users are unable to access Microsoft 365 Copilot Chat or portal.office.com<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\n\n\n\n\n\n\n\n\n\n
Status<\/th>\nserviceRestored<\/td>\n<\/tr>\n
Classification<\/th>\nincident<\/td>\n<\/tr>\n
User Impact<\/th>\nUsers may have been unable to access Microsoft 365 Copilot Chat or portal.office.com.<\/td>\n<\/tr>\n
Last Updated<\/th>\n06\/11\/2026 22:06:46<\/td>\n<\/tr>\n
Start Time<\/th>\n06\/11\/2026 21:12:12<\/td>\n<\/tr>\n
End Time<\/th>\n06\/11\/2026 22:01:25<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Users are unable to access Microsoft 365 Copilot Chat or portal.office.com<\/p>\n

User impact: Users are unable to access Microsoft 365 Copilot Chat or portal.office.com.<\/p>\n

More info: Admins may have been able to access the Microsoft 365 admin center via admin.cloud.microsoft as a temporary solution. Additionally, Copilot in Microsoft Teams was not impacted and could have been leveraged in the interim while we mitigated the issue.<\/p>\n

Final status: We\u2019ve successfully rolled back the change throughout the affected infrastructure, and we’ve confirmed with previously affected users that the impact is mitigated. <\/p>\n

Scope of impact: Any user or admin may have been affected by this event. <\/p>\n

Start time: Thursday, June 11, 2026, at 8:00 PM UTC<\/p>\n

End time: Thursday, June 11, 2026, at 9:56 PM UTC<\/p>\n

Preliminary root cause: We’ve identified an issue with a recent deployment which is contributing to impact. We will provide more information in our Post-Incident Report.<\/p>\n

Next steps: – We’re analyzing the recent deployment to identify why this issue occurred and how to prevent it from happening again in the future.
– We’re reviewing our change management processes to determine areas of improvement. <\/p>\n

We’ll provide a preliminary Post-Incident Report within two business days and a final Post-Incident Report within five business days.<\/td>\n<\/tr>\n

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\u958b\u59cb\u6642\u9593:2026\u5e746\u670811\u65e5\u6728\u66dc\u65e5 \u5348\u5f8c8\u6642 UTC<\/p>\n

\u7d42\u4e86\u6642\u523b:2026\u5e746\u670811\u65e5\u6728\u66dc\u65e5 21:56 UTC<\/p>\n

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– \u6539\u5584\u70b9\u3092\u7279\u5b9a\u3059\u308b\u305f\u3081\u306b\u30c1\u30a7\u30f3\u30b8\u30de\u30cd\u30b8\u30e1\u30f3\u30c8\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u898b\u76f4\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

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MO1387691 | Microsoft 365 suite | Users are unable to access Microsoft 365 Copilot Chat or portal.office.com S […]<\/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-16818","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16818","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=16818"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16818\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=16818"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=16818"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=16818"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}