{"id":15674,"date":"2026-03-31T07:00:56","date_gmt":"2026-03-30T22:00:56","guid":{"rendered":"https:\/\/m365jp.net\/?p=15674"},"modified":"2026-03-31T07:01:07","modified_gmt":"2026-03-30T22:01:07","slug":"servicedegradation-ex1259460-exchange-online-some-users-may-be-unable-to-access-custom-add-ins-through-any-exchange-online-connection-method-7","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-03-31-servicedegradation-ex1259460-exchange-online-some-users-may-be-unable-to-access-custom-add-ins-through-any-exchange-online-connection-method-7","title":{"rendered":"[serviceDegradation] EX1259460 | Exchange Online | Some users may be unable to access custom add-ins through any Exchange Online connection method"},"content":{"rendered":"<div class=\"postie-post\">\n<div>\n<hr>\n<table id=\"section\">\n<tbody>\n<tr>\n<th width=\"95%\">EX1259460 | Exchange Online | Some users may be unable to access custom add-ins through any Exchange Online connection method<\/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\">serviceDegradation<\/td>\n<\/tr>\n<tr>\n<th>Classification<\/th>\n<td>advisory<\/td>\n<\/tr>\n<tr>\n<th>User Impact<\/th>\n<td>Users may be unable to access custom add-ins through any Exchange Online connection method.<\/td>\n<\/tr>\n<tr>\n<th>Last Updated<\/th>\n<td>03\/30\/2026 21:14:29<\/td>\n<\/tr>\n<tr>\n<th>Start Time<\/th>\n<td>03\/03\/2026 13:52:00<\/td>\n<\/tr>\n<tr>\n<th>End Time<\/th>\n<td><\/td>\n<\/tr>\n<tr>\n<th>Latest Message<\/th>\n<td>Title: Some users may be unable to access custom add-ins through any Exchange Online connection method<\/p>\n<p>  User impact: Users may be unable to access custom add-ins through any Exchange Online connection method.<\/p>\n<p>  More info: For additional guidance on managing Exchange Web Services, please refer to the following:<\/p>\n<p>  <a href=\"https:\/\/learn.microsoft.com\/en-us\/exchange\/client-developer\/exchange-web-services\/how-to-control-access-to-ews-in-exchange\">learn.microsoft.com\/en-us\/exchange\/client-developer\/exchange-web-services\/how-to-control-access-to-ews-in-exchange<\/a><\/p>\n<p>  Current status:&nbsp;We&#8217;re continuing to validate our suspected root cause as mentioned in our previous communication update, and we&nbsp;recommend following the guidance in the &#8220;More Info&#8221; section to verify that Exchange Web Services access is enabled. Once enabled,   we request that impacted users validate whether the custom add-ins are accessible. If impact persists for users after enabling this, please contact us through your support case for further investigation.<\/p>\n<p>  Scope of impact: Some users who are attempting to access custom add-ins through all Exchange Online connection methods may be impacted. This section may be updated as our investigation continues.<\/p>\n<p>  Next update by: Tuesday, March 31, 2026, at 9:00 PM UTC<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>EX1259460 | Exchange Online | Some users may be unable to access custom add-ins through any Exchange Online co [&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-15674","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/15674","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=15674"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/15674\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=15674"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=15674"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=15674"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}