{"id":14018,"date":"2025-11-26T06:00:51","date_gmt":"2025-11-25T21:00:51","guid":{"rendered":"https:\/\/m365jp.net\/?p=14018"},"modified":"2025-11-26T06:01:58","modified_gmt":"2025-11-25T21:01:58","slug":"servicedegradation-ex1188132-exchange-online-some-users-may-be-intermittently-unable-to-access-their-exchange-online-mailboxes-using-any-connection-method-10","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2025-11-26-servicedegradation-ex1188132-exchange-online-some-users-may-be-intermittently-unable-to-access-their-exchange-online-mailboxes-using-any-connection-method-10","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 20:39:16<\/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: Our fix has completed approximately 92 percent of its deployment, with a majority of users no longer impacted. As the remaining impacted users decrease, a small subset may continue to experience intermittent impact while our fix completes saturation. Our estimated timeline projects that the impact for all users will be remediated by our next scheduled communication 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

Start time: Monday, November 17, 2025, at 5:11 PM UTC<\/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: Wednesday, November 26, 2025, at 1:00 AM 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-14018","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14018","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=14018"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14018\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=14018"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=14018"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=14018"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}