{"id":16493,"date":"2026-05-25T18:01:10","date_gmt":"2026-05-25T09:01:10","guid":{"rendered":"https:\/\/m365jp.net\/?p=16493"},"modified":"2026-05-25T18:03:06","modified_gmt":"2026-05-25T09:03:06","slug":"servicerestored-ex1321282-exchange-online-users-were-intermittently-unable-to-access-exchange-online","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-05-25-servicerestored-ex1321282-exchange-online-users-were-intermittently-unable-to-access-exchange-online","title":{"rendered":"[serviceRestored] EX1321282 | Exchange Online | Users were intermittently unable to access Exchange Online"},"content":{"rendered":"
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EX1321282 | Exchange Online | Users were intermittently unable to access Exchange Online<\/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 were intermittently unable to access Exchange Online.<\/td>\n<\/tr>\n
Last Updated<\/th>\n05\/25\/2026 08:43:12<\/td>\n<\/tr>\n
Start Time<\/th>\n05\/24\/2026 23:00:00<\/td>\n<\/tr>\n
End Time<\/th>\n05\/25\/2026 07:15:00<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Users were intermittently unable to access Exchange Online <\/p>\n

User impact: Users were intermittently unable to access Exchange Online. <\/p>\n

More info: Users experienced intermittent failures when attempting to access their mailbox, including sign-in failures and connection errors. This impact occurred across various connection methods and client experiences, where access attempts did not complete successfully or timed out. <\/p>\n

Final status: We\u2019ve confirmed after a period of monitoring, that the impacted infrastructure self-restored, and service has returned to expected performance levels. We’ll closely monitor the service to ensure that it remains healthy. <\/p>\n

Scope of impact: Impact was specific to some users served through the affected infrastructure in the Exchange Online service, attempting to access their mailboxes. <\/p>\n

Start time: Sunday, May 24, 2026, at 11:00 PM UTC <\/p>\n

End time: Monday, May 25, 2026, at 7:15 AM UTC <\/p>\n

Root cause: A service issue following an authentication activity led to a condition that disrupted normal authentication behavior and access to Exchange Online. <\/p>\n

Next steps: We’re analyzing performance data and trends on the affected infrastructure to help prevent this problem from happening again. <\/p>\n

This is the final update for this event.<\/td>\n<\/tr>\n

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EX1321282 | Exchange Online | Users were intermittently unable to access Exchange Online Status serviceRestore […]<\/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-16493","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16493","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=16493"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16493\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=16493"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=16493"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=16493"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}