{"id":15880,"date":"2026-04-14T01:15:24","date_gmt":"2026-04-13T16:15:24","guid":{"rendered":"https:\/\/m365jp.net\/?p=15880"},"modified":"2026-04-14T01:16:36","modified_gmt":"2026-04-13T16:16:36","slug":"servicedegradation-ex1278714-exchange-online-some-users-may-be-unable-to-access-email-messages-in-outlook-mobile-when-connecting-to-exchange-on-premises-2","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-04-14-servicedegradation-ex1278714-exchange-online-some-users-may-be-unable-to-access-email-messages-in-outlook-mobile-when-connecting-to-exchange-on-premises-2","title":{"rendered":"[serviceDegradation] EX1278714 | Exchange Online | Some users may be unable to access email messages in Outlook Mobile when connecting to Exchange on\u2011premises"},"content":{"rendered":"
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EX1278714 | Exchange Online | Some users may be unable to access email messages in Outlook Mobile when connecting to Exchange on\u2011premises<\/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 unable to access email messages in Outlook Mobile when connecting to Exchange on\u2011premises.<\/td>\n<\/tr>\n
Last Updated<\/th>\n04\/13\/2026 15:18:16<\/td>\n<\/tr>\n
Start Time<\/th>\n04\/10\/2026 17:30:00<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Some users may be unable to access email messages in Outlook Mobile when connecting to Exchange on\u2011premises <\/p>\n

User impact: Users may be unable to access email messages in Outlook Mobile when connecting to Exchange on\u2011premises. <\/p>\n

Current status: We’ve identified that an authentication component misconfiguration is impacting the Autodiscover flow for Exchange on\u2011premises connections, which is preventing Outlook Mobile from automatically establishing access for affected users. We’re developing a fix to correct misconfiguration and once complete, we’ll validate its efficacy before deploying to affected environments. <\/p>\n

Scope of impact: Your organization is affected by this event, and some users attempting to access email messages in Outlook Mobile when connecting to Exchange on\u2011premises may be impacted. This information may be updated as our investigation continues. <\/p>\n

Start time: Friday, April 10, 2026, at 5:30 PM UTC<\/p>\n

Root cause: An authentication component misconfiguration is impacting the Autodiscover flow for Exchange on\u2011premises connections, which is preventing Outlook Mobile from automatically establishing access for affected users. <\/p>\n

Next update by: Monday, April 13, 2026, at 6:00 PM UTC<\/td>\n<\/tr>\n

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EX1278714 | Exchange Online | Some users may be unable to access email messages in Outlook Mobile when connect […]<\/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-15880","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/15880","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=15880"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/15880\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=15880"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=15880"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=15880"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}