{"id":14032,"date":"2025-11-27T04:00:51","date_gmt":"2025-11-26T19:00:51","guid":{"rendered":"https:\/\/m365jp.net\/?p=14032"},"modified":"2025-11-27T04:01:09","modified_gmt":"2025-11-26T19:01:09","slug":"servicedegradation-ex1188132-exchange-online-some-users-may-be-intermittently-unable-to-access-their-exchange-online-mailboxes-using-any-connection-method-12","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2025-11-27-servicedegradation-ex1188132-exchange-online-some-users-may-be-intermittently-unable-to-access-their-exchange-online-mailboxes-using-any-connection-method-12","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\/26\/2025 18:38:23<\/td>\n<\/tr>\n
Start Time<\/th>\n11\/17\/2025 17:11:00<\/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 reached 93 percent saturation in the affected environments and we are monitoring service availability as our fix saturates to confirm service is restored for affected users.<\/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: Monday, December 1, 2025, at 8:00 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-14032","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14032","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=14032"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14032\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=14032"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=14032"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=14032"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}