{"id":13994,"date":"2025-11-25T10:01:10","date_gmt":"2025-11-25T01:01:10","guid":{"rendered":"https:\/\/m365jp.net\/?p=13994"},"modified":"2025-11-25T10:02:39","modified_gmt":"2025-11-25T01:02:39","slug":"servicedegradation-ex1188132-exchange-online-some-users-may-be-intermittently-unable-to-access-their-exchange-online-mailboxes-using-any-connection-method-9","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2025-11-25-servicedegradation-ex1188132-exchange-online-some-users-may-be-intermittently-unable-to-access-their-exchange-online-mailboxes-using-any-connection-method-9","title":{"rendered":"[serviceDegradation] EX1188132 | Exchange Online | Some users may be intermittently unable to access their Exchange Online mailboxes using any connection method"},"content":{"rendered":"
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EX1188132 | Exchange Online | Some users may be intermittently unable to access their Exchange Online mailboxes using any connection method<\/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>\nadvisory<\/td>\n<\/tr>\n
User Impact<\/th>\nUsers may be intermittently unable to access their Exchange Online mailboxes using any connection method.<\/td>\n<\/tr>\n
Last Updated<\/th>\n11\/25\/2025 00:18:58<\/td>\n<\/tr>\n
Start Time<\/th>\n11\/20\/2025 13:25:00<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Some users may be intermittently unable to access their Exchange Online mailboxes using any connection method<\/p>\n

User impact: Users may be intermittently unable to access their Exchange Online mailboxes using any connection method.<\/p>\n

Current status: We’ve deployed a fix that has relieved issue for the majority of impacted users and we\u2019re continuing to monitor the rollout of this fix while also investigating the subset of users still experiencing impact. We’ll provide a timeline for full mitigation of this impact by our next scheduled update.<\/p>\n

Scope of impact: This issue appears to be intermittently impacting a small subset of users, though potentially any user accessing Exchange Online may be intermittently affected.<\/p>\n

Root cause: An indexing issue within a section of mailbox database infrastructure responsible for providing access to Exchange Online mailboxes caused mailbox state invalidations and client disconnections, resulting in impact.<\/p>\n

Next update by: Tuesday, November 25, 2025, at 9:30 PM UTC<\/td>\n<\/tr>\n

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EX1188132 | Exchange Online | Some users may be intermittently unable to access their Exchange Online mailboxe […]<\/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-13994","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/13994","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=13994"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/13994\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=13994"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=13994"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=13994"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}