{"id":15529,"date":"2026-03-24T02:00:58","date_gmt":"2026-03-23T17:00:58","guid":{"rendered":"https:\/\/m365jp.net\/?p=15529"},"modified":"2026-03-24T02:01:23","modified_gmt":"2026-03-23T17:01:23","slug":"servicedegradation-ex1256020-exchange-online-some-users-may-be-intermittently-unable-to-access-their-exchange-online-mailboxes-in-some-connection-methods-5","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-03-24-servicedegradation-ex1256020-exchange-online-some-users-may-be-intermittently-unable-to-access-their-exchange-online-mailboxes-in-some-connection-methods-5","title":{"rendered":"[serviceDegradation] EX1256020 | Exchange Online | Some users may be intermittently unable to access their Exchange Online mailboxes in some connection methods"},"content":{"rendered":"
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EX1256020 | Exchange Online | Some users may be intermittently unable to access their Exchange Online mailboxes in some connection methods<\/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 may be intermittently unable to access their Exchange Online mailboxes in some connection methods.<\/td>\n<\/tr>\n
Last Updated<\/th>\n03\/23\/2026 16:24:13<\/td>\n<\/tr>\n
Start Time<\/th>\n03\/12\/2026 00:00:00<\/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 in some connection methods<\/p>\n

User impact: Users may be intermittently unable to access their Exchange Online mailboxes in some connection methods.<\/p>\n

More info: This issue may intermittently impact some users who are attempting to access the Exchange Online service through the Outlook mobile apps or the new Outlook for Mac desktop client.<\/p>\n

Current status: After further assessment, we\u2019ve confirmed that the identified change within the Exchange Online service intended to introduce a new virtual account resulted in impact. To remediate this issue, we\u2019re disabling the change across the affected environments. Once available, we\u2019ll provide a resolution timeline.<\/p>\n

Scope of impact: Impact may occur for some users intermittently and users may be unable to access their Exchange Online mailboxes with the Outlook mobile apps.<\/p>\n

Start time: Thursday, March 12, 2026, at 12:00 AM UTC<\/p>\n

Root cause: A recent change within the Exchange Online service intended to introduce a new virtual account resulted in impact.<\/p>\n

Next update by: Monday, March 23, 2026, at 6:30 PM UTC<\/td>\n<\/tr>\n

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EX1256020 | 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-15529","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/15529","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=15529"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/15529\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=15529"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=15529"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=15529"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}