{"id":16460,"date":"2026-05-22T03:01:40","date_gmt":"2026-05-21T18:01:40","guid":{"rendered":"https:\/\/m365jp.net\/?p=16460"},"modified":"2026-05-22T03:03:11","modified_gmt":"2026-05-21T18:03:11","slug":"mc1189663-updated-retirement-of-external-access-token-for-actionable-messages-c-moving-to-microsoft-entra-authentication-2","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-05-22-mc1189663-updated-retirement-of-external-access-token-for-actionable-messages-c-moving-to-microsoft-entra-authentication-2","title":{"rendered":"MC1189663 | (Updated) Retirement of external access token for actionable messages C moving to Microsoft Entra authentication"},"content":{"rendered":"<div class=\"postie-post\">\n<div>\n<hr>\n<table id=\"section\">\n<tbody>\n<tr>\n<th width=\"95%\">MC1189663 | (Updated) Retirement of external access token for actionable messages C moving to Microsoft Entra authentication<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr>\n<table id=\"data\">\n<tbody>\n<tr>\n<th>Classification<\/th>\n<td>planForChange<\/td>\n<\/tr>\n<tr>\n<th>Last Updated<\/th>\n<td>05\/21\/2026 17:04:16<\/td>\n<\/tr>\n<tr>\n<th>Start Time<\/th>\n<td>11\/25\/2025 00:05:43<\/td>\n<\/tr>\n<tr>\n<th>End Time<\/th>\n<td>07\/15\/2026 07:00:00<\/td>\n<\/tr>\n<tr>\n<th>Action Required By Date<\/th>\n<td>2026-03-30T07:00:00Z<\/td>\n<\/tr>\n<tr>\n<th>Message Content<\/th>\n<td>\n<p>  <\/p>\n<p>Updated May 21, 2026: Phasing out to Legacy Auth Token (EAT) has been initiated and will complete by June 8th 2026. Thank you for your patience.&nbsp;<\/p>\n<p><b>[Introduction]<\/b><\/p>\n<p>We\u2019re retiring the use of <b>external access tokens<\/b> for <b>actionable messages<\/b> and transitioning to Microsoft Entra-based authentication. This update enhances security and aligns with modern identity standards, providing a more robust and compliant   experience for <b>actionable messages<\/b>.<b><br \/>  <\/b><\/p>\n<p><b>[When this will happen]<\/b><\/p>\n<p>This change takes effect on <b>May 15, 2026<\/b>. After this date, <b>external access tokens<\/b> will no longer be supported.<\/p>\n<p><b>[How this affects your organization]<\/b><b><br \/>  <\/b><\/p>\n<p><b>Who is affected:<\/b><\/p>\n<p>Organizations using <b>actionable messages<\/b> that currently rely on <b>external access tokens<\/b>.<\/p>\n<p><b>What will happen:<\/b><\/p>\n<ul>  <\/p>\n<li><b>Actionable messages<\/b> that depend on <b>external access tokens<\/b> will fail after<b> May 15, 2026<\/b>.<\/li>\n<p>  <\/p>\n<li>All integrations and workflows using <b>actionable messages<\/b> must adopt <b>  Microsoft Entra authentication<\/b>.<\/li>\n<p>  <\/p>\n<li>This change improves security posture by leveraging Entra\u2019s identity and access management capabilities.<\/li>\n<p>  <\/ul>\n<p>  <b>[What you can do to prepare]<\/b>  <\/p>\n<ul>  <\/p>\n<li>Review all actionable message implementations in your organization.<\/li>\n<p>  <\/p>\n<li>Update integrations to use <b>Microsoft Entra authentication<\/b> before <b>May 15, 2026<\/b>.<\/li>\n<p>  <\/ul>\n<p>Learn more: <\/p>\n<ul>\n<li><a href=\"https:\/\/learn.microsoft.com\/outlook\/actionable-messages\/\" target=\"_blank\">Actionable messages in Outlook and Office 365 Groups<\/a><\/li>\n<li><a href=\"https:\/\/learn.microsoft.com\/outlook\/actionable-messages\/enable-entra-token-for-actionable-messages\" target=\"_blank\">Enable Entra token for Actionable messages<\/a><\/li>\n<p>  <\/ul>\n<p>  <b>[Compliance considerations]<\/b>  <\/p>\n<p>No compliance considerations identified, review as appropriate for your organization.<\/p>\n<\/td>\n<\/tr>\n<tr>\n<th>Machine Translation<\/th>\n<td>\n<p>  <\/p>\n<p>2026\u5e745\u670821\u65e5\u66f4\u65b0:\u30ec\u30ac\u30b7`J^\u30c8`\u30af\u30f3(EAT)\u3078\u306e\u30d5\u30a7`\u30ba\u30a2\u30a6\u30c8\u304c_\u59cb\u3055\u308c\u30012026\u5e746\u67088\u65e5\u307e\u3067\u306b\u5b8c\u4e86\u3057\u307e\u3059\u3002\u3054\u8f9b\u62b1\u3044\u305f\u3060\u304d\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3059\u3002&nbsp;<\/p>\n<p><b>[\u306f\u3058\u3081\u306b]<\/b><\/p>\n<p><b>\u79c1\u305f\u3061\u306f\u3001g\u884c\u53ef\u80fd\u306a\u30e1\u30c3\u30bb`\u30b8<\/b>\u306e\u305f\u3081\u306e<b>\u5916\u90e8\u30a2\u30af\u30bb\u30b9\u30c8`\u30af\u30f3<\/b>\u306e\u4f7f\u7528\u3092\u6b62\u3057\u3001Microsoft Entra\u30d9`\u30b9\u306eJ^\u306b\u79fb\u884c\u3057\u307e\u3059\u3002\u3053\u306e\u30a2\u30c3\u30d7\u30c7`\u30c8\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5316\u3057\u3001F\u4ee3\u306eID\u80dc\u8bc9m\u5408\u3057\u3001\u3088\u308a\u5cb3\u97e6\u948e\u507f\u8797\u6293\u6957\u3045\u8797\u5de5\u3057\u305f<b>\u53ef\u80fd\u306a\u30e1\u30c3\u30bb`\u30b8<\/b>\u306e\u4f53Y\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<b><br \/>  <\/b><\/p>\n<p><b>[\u3044\u3064\u8d77\u3053\u308b\u304b]<\/b><\/p>\n<p>\u3053\u306e\u6d93 <b>\u306f2026\u5e745\u670815<\/b>\u65e5\u306b\u65bd\u884c\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u65e5\u4ee5\u964d\u3001 <b>\u5916\u90e8\u30a2\u30af\u30bb\u30b9\u30c8`\u30af\u30f3<\/b> \u306e\u30b5\u30dd`\u30c8\u306fK\u4e86\u3057\u307e\u3059\u3002<\/p>\n<p><b>[\u3053\u308c\u304c\u3042\u306a\u305f\u306eM\u306b\u4e0e\u3048\u308b\u5f71]<\/b><b><br \/>  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<\/p>\n<li>\u3053\u306e\u6d93\u6454\u745c\u8f8dEntra\u306e\u30a2\u30a4\u30c7\u30f3\u30c6\u30a3\u30c6\u30a3\u304a\u3088\u3073\u30a2\u30af\u30bb\u30b9\u7ba1\u7406C\u80fd\u3092\u6d3b\u7528\u3057\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4f53\u5236\u304c\u5316\u3055\u308c\u307e\u3059\u3002<\/li>\n<p>  <\/ul>\n<p>  <b>\u3010\u6d43\u97e6\u90e1\u5e5b\u6454\u6266\u6bea\u957f\u53d6<\/b>  <\/p>\n<ul>  <\/p>\n<li>M\u5185\u306e\u3059\u3079\u3066\u306eg\u884c\u53ef\u80fd\u306a\u30e1\u30c3\u30bb`\u30b8g\u88c5\u3092\u76f4\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<p>  <\/p>\n<li><b>2026\u5e745\u670815\u65e5<\/b>\u307e\u3067\u306b<b>Microsoft EntraJ^<\/b>\u3092\u4f7f\u7528\u3059\u308by\u5408\u3092\u66f4\u65b0\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<p>  <\/ul>\n<p>\u3057\u304f\u306f\u3053\u3061\u3089: <\/p>\n<ul>\n<li><a href=\"https:\/\/learn.microsoft.com\/outlook\/actionable-messages\/\" target=\"_blank\">Outlook\u304a\u3088\u3073Office 365\u30b0\u30eb`\u30d7\u306b\u304a\u3051\u308bg\u884c\u53ef\u80fd\u306a\u30e1\u30c3\u30bb`\u30b8<\/a><\/li>\n<li><a href=\"https:\/\/learn.microsoft.com\/outlook\/actionable-messages\/enable-entra-token-for-actionable-messages\" target=\"_blank\">Actionable \u30e1\u30c3\u30bb`\u30b8\u7528\u306bEntra\u30c8`\u30af\u30f3\u3092\u6709\u90e1\u6454\u5de5<\/a><\/li>\n<p>  <\/ul>\n<p>  <b>[\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u306e\u8003]\u4e8b]<\/b>  <\/p>\n<p>\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u4e0a\u306e\u5937\u948d\u9a6c\u306f\u7279\u5b9a\u3055\u308c\u305a\u3001M\u306b\u3058\u3066\u30ec\u30d3\u30e5`\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>MC1189663 | (Updated) Retirement of external access token for actionable messages C moving to Microsoft Entra  [&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-16460","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16460","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=16460"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16460\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=16460"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=16460"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=16460"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}