{"id":14462,"date":"2026-01-10T03:01:27","date_gmt":"2026-01-09T18:01:27","guid":{"rendered":"https:\/\/m365jp.net\/?p=14462"},"modified":"2026-01-10T03:02:46","modified_gmt":"2026-01-09T18:02:46","slug":"mc1171845-updated-microsoft-defender-for-office-365-enhancing-the-quarantine-experience-for-administrators-2","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-01-10-mc1171845-updated-microsoft-defender-for-office-365-enhancing-the-quarantine-experience-for-administrators-2","title":{"rendered":"MC1171845 | (Updated) Microsoft Defender for Office 365: Enhancing the quarantine experience for administrators"},"content":{"rendered":"<div class=\"postie-post\">\n<div>\n<hr>\n<table id=\"section\">\n<tbody>\n<tr>\n<th width=\"95%\">MC1171845 | (Updated) Microsoft Defender for Office 365: Enhancing the quarantine experience for administrators<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr>\n<table id=\"data\">\n<tbody>\n<tr>\n<th>Classification<\/th>\n<td>stayInformed<\/td>\n<\/tr>\n<tr>\n<th>Last Updated<\/th>\n<td>01\/09\/2026 17:31:08<\/td>\n<\/tr>\n<tr>\n<th>Start Time<\/th>\n<td>10\/13\/2025 23:25:16<\/td>\n<\/tr>\n<tr>\n<th>End Time<\/th>\n<td>04\/30\/2026 08:00:00<\/td>\n<\/tr>\n<tr>\n<th>Message Content<\/th>\n<td>\n<p>Updated January 9, 2026: We have updated the timeline. Thank you for your patience.<\/p>\n<p>We\u2019re <b>improving the quarantine experience<\/b> in <i>Microsoft Defender for Office 365<\/i> to deliver greater clarity, visibility, and ease of use for administrators. These updates include backend enhancements for improved durability and consistency as   well as experience updates to list messages in quarantine by individual recipients to simplify navigation and management.<\/p>\n<p>  <b>When this will happen:<\/b>  <\/p>\n<ul>  <\/p>\n<li><b>General Availability (Worldwide and GCC): <\/b>We will begin rolling out in early January 2026 (previously early November 2025) and expect to complete by end of March 2026 (previously end of February).  <\/li>\n<li><b>General Availability (GCCH and DoD): <\/b>We will begin rolling out in early January 2026 (previously early December 2025) and expect to complete by end of March 2026 (previously end of February).<\/li>\n<p>  <\/ul>\n<p>  <b>How this affects your organization:<\/b>  <\/p>\n<ul>  <\/p>\n<li><b>Who is affected:<\/b> Administrators managing quarantined messages in Microsoft Defender for Office 365.<\/li>\n<p>  <\/p>\n<li><b>What will happen:<\/b><br \/> \n<ul>  <\/p>\n<li>Quarantined messages will now be listed by individual recipient instead of grouped by multiple recipients.<\/li>\n<p>  <\/p>\n<li>Backend enhancements will improve durability and consistency.<\/li>\n<p>  <\/p>\n<li>Existing quarantine release cmdlets will all remain functional. Administrators should be cognizant that `<b>ReleaseToAll<\/b>` now applies to a single user as aggregation has been removed. Admins must release messages for each intended mailbox individually.<\/li>\n<p>  <\/p>\n<li>No changes to end-user experience.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><i>Screenshot 1 &#8211; <b>Updated <\/b>quarantine view showing <b>individual recipients listed separately<\/b> in the Recipient column:<\/i><\/p>\n<p><img decoding=\"async\" style=\"width: 400px\" alt=\"user settings\" src=\"https:\/\/cxcs.microsoft.net\/static\/public\/messagecenter\/neutral\/246243b9-3537-4b95-b438-4fcfaca3145f\/1a3b905a51335e39e4f0f7e236884dd363e78119.png\"><\/p>\n<p><i><\/i><\/p>\n<p><i>Screenshot 2 &#8211; <b>Existing<\/b> quarantine view showing <b>multiple recipients<\/b> in the Recipient column:<\/i><\/p>\n<p><i>&nbsp;<\/i><img decoding=\"async\" style=\"width: 400px\" alt=\"user settings\" src=\"https:\/\/cxcs.microsoft.net\/static\/public\/messagecenter\/neutral\/81c2e6a8-afca-4f34-8a87-a1d293d53c8f\/ac875dbc78ddaa73fe5b580e3b9d2fbb3435f56a.png\"><\/p>\n<\/p>\n<ul>  <\/ul>\n<p>  <\/p>\n<ul>  <\/ul>\n<\/p>\n<p><b>What you can do to prepare:<\/b>  <\/p>\n<ul>  <\/p>\n<li>Review your organization\u2019s quarantine release practices.<\/li>\n<p>  <\/p>\n<li>Update any internal documentation to reflect the new recipient-level view.<\/li>\n<p>  <\/p>\n<li>Communicate this change to helpdesk or support teams as needed.<\/li>\n<p>  <\/p>\n<li>Learn more:&nbsp;\n<ul>\n<li><a href=\"https:\/\/learn.microsoft.com\/defender-office-365\/mdo-about\">Microsoft Defender for Office 365 overview | Microsoft Learn<\/a><\/li>\n<li><a href=\"https:\/\/learn.microsoft.com\/defender-office-365\/quarantine-admin-manage-messages-files\" target=\"_blank\">Manage quarantined messages and files as an admin | Microsoft Defender for Office 365 | Microsoft Learn<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><b>Compliance considerations:<\/b><\/p>\n<p>No compliance considerations identified, review as appropriate for your organization.<\/p>\n<\/p>\n<\/td>\n<\/tr>\n<tr>\n<th>Machine Translation<\/th>\n<td>\n<p>2026\u5e741\u67089\u65e5\u66f4\u65b0:\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u3092\u66f4\u65b0\u3057\u307e\u3057\u305f\u3002\u3054\u8f9b\u62b1\u3044\u305f\u3060\u304d\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3059\u3002<\/p>\n<p>Microsoft <i>Defender for Office 365<\/i>\u306e<b>\u9694\u96e2\u4f53\u9a13\u3092\u6539\u5584\u3057<\/b>\u3001\u7ba1\u7406\u8005\u306b\u3068\u3063\u3066\u3088\u308a\u660e\u78ba\u3067\u53ef\u8996\u6027\u304c\u9ad8\u304f\u3001\u4f7f\u3044\u3084\u3059\u3055\u3082\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u306b\u306f\u3001\u8010\u4e45\u6027\u3068\u4e00\u8cab\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u306e\u5f37\u5316\u3084\u3001\u500b\u3005\u306e\u53d7\u4fe1\u8005\u306b\u3088\u308b\u9694\u96e2\u30e1\u30c3\u30bb\u30fc\u30b8\u30ea\u30b9\u30c8\u5316\u306b\u3088\u308b\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u3084\u7ba1\u7406\u306e\u7c21\u7d20\u5316\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/p>\n<p>  <b>\u305d\u306e\u6642\u671f:<\/b>  <\/p>\n<ul>  <\/p>\n<li><b>\u4e00\u822c\u63d0\u4f9b\u72b6\u6cc1(\u4e16\u754c\u304a\u3088\u3073GCC): <\/b>\u5c55\u958b\u306f2026\u5e741\u6708\u521d\u65ec(\u4ee5\u524d\u306f2025\u5e7411\u6708\u521d\u65ec)\u306b\u958b\u59cb\u3055\u308c\u30012026\u5e743\u6708\u672b(\u4ee5\u524d\u306f2\u6708\u672b)\u307e\u3067\u306b\u5b8c\u4e86\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/li>\n<li><b>\u4e00\u822c\u7a3c\u50cd\u671f\u9593(GCCH\u304a\u3088\u3073DoD): <\/b>\u5c55\u958b\u306f2026\u5e741\u6708\u521d\u65ec(\u4ee5\u524d\u306f2025\u5e7412\u6708\u521d\u65ec)\u3067\u30012026\u5e743\u6708\u672b(\u4ee5\u524d\u306f2\u6708\u672b)\u307e\u3067\u306b\u5b8c\u4e86\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/li>\n<p>  <\/ul>\n<p>  <b>\u3053\u308c\u304c\u3042\u306a\u305f\u306e\u7d44\u7e54\u306b\u4e0e\u3048\u308b\u5f71\u97ff:<\/b>  <\/p>\n<ul>  <\/p>\n<li><b>\u5f71\u97ff\u3092\u53d7\u3051\u308b\u4eba\u7269:<\/b> Microsoft Defender for Office 365\u3067\u9694\u96e2\u3055\u308c\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u7ba1\u7406\u3059\u308b\u7ba1\u7406\u8005\u3002<\/li>\n<p>  <\/p>\n<li><b>\u4eca\u5f8c\u306e\u5c55\u958b:<\/b><br \/> \n<ul>  <\/p>\n<li>\u9694\u96e2\u3055\u308c\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u3001\u8907\u6570\u306e\u53d7\u4fe1\u8005\u3054\u3068\u306b\u30b0\u30eb\u30fc\u30d7\u5316\u3055\u308c\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u500b\u3005\u306e\u53d7\u4fe1\u8005\u3054\u3068\u306b\u30ea\u30b9\u30c8\u3055\u308c\u307e\u3059\u3002<\/li>\n<p>  <\/p>\n<li>\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u306e\u5f37\u5316\u306f\u8010\u4e45\u6027\u3068\u4e00\u8cab\u6027\u3092\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002<\/li>\n<p>  <\/p>\n<li>\u65e2\u5b58\u306e\u9694\u96e2\u30ea\u30ea\u30fc\u30b9\u30b3\u30de\u30f3\u30c9\u30ec\u30c3\u30c8\u306f\u3059\u3079\u3066\u6a5f\u80fd\u3057\u7d9a\u3051\u307e\u3059\u3002\u7ba1\u7406\u8005\u306f\u3001\u96c6\u7d04\u304c\u524a\u9664\u3055\u308c\u305f\u305f\u3081\u3001\u300e<b>ReleaseToAll<\/b>\u300f\u304c\u5358\u4e00\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u9069\u7528\u3055\u308c\u308b\u3053\u3068\u3092\u8a8d\u8b58\u3057\u3066\u304a\u304f\u3079\u304d\u3067\u3059\u3002\u7ba1\u7406\u8005\u306f\u5404\u610f\u56f3\u3055\u308c\u305f\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u3054\u3068\u306b\u500b\u5225\u306b\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u516c\u958b\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/li>\n<p>  <\/p>\n<li>\u30a8\u30f3\u30c9\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u306e\u5909\u66f4\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><i>\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c81 &#8211; \u500b\u5225\u306e\u53d7\u53d6\u4eba\u304c\u300c\u53d7\u53d6\u4eba\u300d\u6b04\u306b<b>\u5225\u3005\u306b\u8a18\u8f09<\/b>\u3055\u308c\u3066\u3044\u308b<b>\u66f4\u65b0<\/b>\u3055\u308c\u305f\u9694\u96e2\u30d3\u30e5\u30fc:<\/i><\/p>\n<p><img decoding=\"async\" style=\"width: 400px\" alt=\"user settings\" src=\"https:\/\/cxcs.microsoft.net\/static\/public\/messagecenter\/neutral\/246243b9-3537-4b95-b438-4fcfaca3145f\/1a3b905a51335e39e4f0f7e236884dd363e78119.png\"><\/p>\n<p><i><\/i><\/p>\n<p><i>\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c82 &#8211; <b>\u65e2\u5b58\u306e<\/b> \u9694\u96e2\u30d3\u30e5\u30fc\u3067 <b>\u8907\u6570\u306e\u53d7\u4fe1\u8005\u304c<\/b> Recipient\u6b04\u306b\u8868\u793a\u3055\u308c\u3066\u3044\u308b:<\/i><\/p>\n<p><i>&nbsp;<\/i><img decoding=\"async\" style=\"width: 400px\" alt=\"user settings\" src=\"https:\/\/cxcs.microsoft.net\/static\/public\/messagecenter\/neutral\/81c2e6a8-afca-4f34-8a87-a1d293d53c8f\/ac875dbc78ddaa73fe5b580e3b9d2fbb3435f56a.png\"><\/p>\n<\/p>\n<ul>  <\/ul>\n<p>  <\/p>\n<ul>  <\/ul>\n<\/p>\n<p><b>\u6e96\u5099\u306e\u305f\u3081\u306b\u3067\u304d\u308b\u3053\u3068:<\/b>  <\/p>\n<ul>  <\/p>\n<li>\u7d44\u7e54\u306e\u9694\u96e2\u89e3\u9664\u6163\u884c\u3092\u898b\u76f4\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<p>  <\/p>\n<li>\u5185\u90e8\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u65b0\u3057\u3044\u53d7\u4fe1\u8005\u30ec\u30d9\u30eb\u306e\u8996\u70b9\u306b\u5408\u308f\u305b\u3066\u66f4\u65b0\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<p>  <\/p>\n<li>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30d8\u30eb\u30d7\u30c7\u30b9\u30af\u3084\u30b5\u30dd\u30fc\u30c8\u30c1\u30fc\u30e0\u306b\u3053\u306e\u5909\u66f4\u3092\u4f1d\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<p>  <\/p>\n<li>\u8a73\u7d30\u60c5\u5831\uff1a&nbsp;\n<ul>\n<li><a href=\"https:\/\/learn.microsoft.com\/defender-office-365\/mdo-about\">Microsoft Defender for Office 365 \u6982\u8981 |Microsoft Learn<\/a><\/li>\n<li><a href=\"https:\/\/learn.microsoft.com\/defender-office-365\/quarantine-admin-manage-messages-files\" target=\"_blank\">\u7ba1\u7406\u8005\u3068\u3057\u3066\u9694\u96e2\u3055\u308c\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u3084\u30d5\u30a1\u30a4\u30eb\u3092\u7ba1\u7406 |Microsoft Defender for Office 365 |Microsoft Learn<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><b>\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u306e\u8003\u616e\u4e8b\u9805:<\/b><\/p>\n<p>\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u4e0a\u306e\u61f8\u5ff5\u4e8b\u9805\u306f\u7279\u5b9a\u3055\u308c\u305a\u3001\u7d44\u7e54\u306b\u5fdc\u3058\u3066\u30ec\u30d3\u30e5\u30fc\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>MC1171845 | (Updated) Microsoft Defender for Office 365: Enhancing the quarantine experience for administrator [&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-14462","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14462","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=14462"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14462\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=14462"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=14462"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=14462"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}