{"id":16813,"date":"2026-06-12T07:01:52","date_gmt":"2026-06-11T22:01:52","guid":{"rendered":"https:\/\/m365jp.net\/?p=16813"},"modified":"2026-06-12T07:04:43","modified_gmt":"2026-06-11T22:04:43","slug":"servicedegradation-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-servicedegradation-mo1387691-microsoft-365-suite-users-are-unable-to-access-microsoft-365-copilot-chat-or-portal-office-com","title":{"rendered":"[serviceDegradation] 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>\nserviceDegradation<\/td>\n<\/tr>\n
Classification<\/th>\nincident<\/td>\n<\/tr>\n
User Impact<\/th>\nUsers are unable to access Microsoft 365 Copilot Chat or portal.office.com.<\/td>\n<\/tr>\n
Last Updated<\/th>\n06\/11\/2026 21:54:45<\/td>\n<\/tr>\n
Start Time<\/th>\n06\/11\/2026 21:12:12<\/td>\n<\/tr>\n
End Time<\/th>\n<\/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 be able to access the Microsoft 365 admin center via admin.cloud.microsoft as a temporary solution. Additionally, Copilot in Microsoft Teams is not expected to be impacted and can be leveraged in the interim while we mitigate the issue. <\/p>\n

Current status: We have successfully reverted the change for 97 percent of the affected infrastructure. We’re continuing to monitor the progress of the reversion and we’re also observing an uptick in service availability. Additionally, we’ve started to receive confirmation that service availability is returning for some users. In parallel, we’re investigating the underlying cause of the problem and will provide more information when available. <\/p>\n

Scope of impact: Our investigation indicates that any user or admin may be affected by this event. This section is subject to change as the investigation continues. <\/p>\n

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

Root cause: We’ve identified an issue with a recent deployment which is contributing to impact. We will continue to perform a root cause analysis to identify how this occurred and how we can prevent this from happening in the future. <\/p>\n

Next update by: Thursday, June 11, 2026, at 11:00 PM UTC<\/td>\n<\/tr>\n

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\u6b21\u56de\u66f4\u65b0:2026\u5e746\u670811\u65e5\u6728\u66dc\u65e5 23:00 UTC<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

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-16813","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16813","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=16813"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16813\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=16813"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=16813"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=16813"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}