{"id":15885,"date":"2026-04-14T03:01:40","date_gmt":"2026-04-13T18:01:40","guid":{"rendered":"https:\/\/m365jp.net\/?p=15885"},"modified":"2026-04-14T03:06:12","modified_gmt":"2026-04-13T18:06:12","slug":"servicerestored-ex1278714-exchange-online-some-users-may-be-unable-to-access-email-messages-in-outlook-mobile-when-connecting-to-exchange-on-premises","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-04-14-servicerestored-ex1278714-exchange-online-some-users-may-be-unable-to-access-email-messages-in-outlook-mobile-when-connecting-to-exchange-on-premises","title":{"rendered":"[serviceRestored] EX1278714 | Exchange Online | Some users may be unable to access email messages in Outlook Mobile when connecting to Exchange on\u2011premises"},"content":{"rendered":"<div class=\"postie-post\">\n<div>\n<hr>\n<table id=\"section\">\n<tbody>\n<tr>\n<th width=\"95%\">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<hr>\n<table id=\"data\">\n<tbody>\n<tr>\n<th>Status<\/th>\n<td class=\"bad\">serviceRestored<\/td>\n<\/tr>\n<tr>\n<th>Classification<\/th>\n<td>incident<\/td>\n<\/tr>\n<tr>\n<th>User Impact<\/th>\n<td>Users may have been unable to access email messages in Outlook Mobile when connecting to Exchange on\u2011premises.<\/td>\n<\/tr>\n<tr>\n<th>Last Updated<\/th>\n<td>04\/13\/2026 17:16:15<\/td>\n<\/tr>\n<tr>\n<th>Start Time<\/th>\n<td>04\/10\/2026 17:30:00<\/td>\n<\/tr>\n<tr>\n<th>End Time<\/th>\n<td>04\/13\/2026 16:00:00<\/td>\n<\/tr>\n<tr>\n<th>Latest Message<\/th>\n<td>Title: Some users may be unable to access email messages in Outlook Mobile when connecting to Exchange on\u2011premises<\/p>\n<p>  User impact: Users may have been unable to access email messages in Outlook Mobile when connecting to Exchange on\u2011premises.<\/p>\n<p>  Final status: The fix to correct the misconfiguration has been deployed and we&#8217;ve confirmed through various user testing that this has successfully mitigated this issue and service has been restored. Users need to re-add their account in Outlook Mobile so that   the Autodiscover flow for Exchange on-premises connections will once again connect correctly.<\/p>\n<p>  Scope of impact: Your organization was affected by this event, and some users attempting to access email messages in Outlook Mobile when connecting to Exchange on\u2011premises may have been impacted.<\/p>\n<p>  Start time: Friday, April 10, 2026, at 5:30 PM UTC<\/p>\n<p>  End time: Monday, April 13, 2026, at 4:00 PM UTC<\/p>\n<p>  Root cause: An authentication component misconfiguration was impacting the Autodiscover flow for Exchange on\u2011premises connections, which was preventing Outlook Mobile from automatically establishing access for affected users.<\/p>\n<p>  Next steps: <br \/>  &#8211; We\u2019ll&nbsp;continue to review the component configuration to understand the misconfiguration in an effort to prevent future similar events.<\/p>\n<p>  This is the final update for the event.<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>EX1278714 | Exchange Online | Some users may be unable to access email messages in Outlook Mobile when connect [&hellip;]<\/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-15885","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/15885","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=15885"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/15885\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=15885"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=15885"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=15885"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}