{"id":17736,"date":"2026-08-07T02:01:42","date_gmt":"2026-08-06T17:01:42","guid":{"rendered":"https:\/\/m365jp.net\/?p=17736"},"modified":"2026-08-07T02:03:33","modified_gmt":"2026-08-06T17:03:33","slug":"mc1431377-updated-microsoft-defender-for-office-365-air-investigation-experience-improvements","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-08-07-mc1431377-updated-microsoft-defender-for-office-365-air-investigation-experience-improvements","title":{"rendered":"MC1431377 | (Updated) Microsoft Defender for Office 365: AIR Investigation Experience Improvements"},"content":{"rendered":"<div class=\"postie-post\">\n<div>\n<hr>\n<table id=\"section\">\n<tbody>\n<tr>\n<th width=\"95%\">MC1431377 | (Updated) Microsoft Defender for Office 365: AIR Investigation Experience Improvements<\/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>08\/06\/2026 16:32:14<\/td>\n<\/tr>\n<tr>\n<th>Start Time<\/th>\n<td>07\/17\/2026 21:38:06<\/td>\n<\/tr>\n<tr>\n<th>End Time<\/th>\n<td>09\/30\/2026 07:00:00<\/td>\n<\/tr>\n<tr>\n<th>Message Content<\/th>\n<td>\n<p>Updated August 6, 2026: We have updated the timeline. Thank you for your patience.&nbsp;<\/p>\n<p><b>[What and Why:]<\/b><\/p>\n<p>  <\/p>\n<p>Microsoft is enhancing the <b>Automated Investigation and Response (AIR)<\/b> experience in  <b>Microsoft Defender for Office 365<\/b> by introducing a manual refresh capability and simplifying investigation naming conventions. These changes improve portal performance, reduce unnecessary network activity, and support data minimization principles by   removing email subjects and <b>User Principal Names (UPNs)<\/b> from investigation names.<\/p>\n<p><b>[Rollout Schedule:]<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li>General Availability (Worldwide): Beginning in <b>mid-August 2026<\/b> (previously&nbsp;late July)&nbsp;and expected to complete by  <b>late August 2026<\/b><\/li>\n<p>  <\/ul>\n<p><b>[Impact on Your Organization:]<\/b><\/p>\n<p><b>Who is affected:<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li>Security Operations Center (SOC) analysts<\/li>\n<p>  <\/p>\n<li>Security administrators<\/li>\n<p>  <\/p>\n<li>Incident responders<\/li>\n<p>  <\/p>\n<li>Organizations using <b>Microsoft Defender for Office 365 Plan 2 \/ E5<\/b> and AIR<\/li>\n<p>  <\/ul>\n<p><b>Platforms\/Services:<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li>Microsoft Defender portal<\/li>\n<p>  <\/p>\n<li>Microsoft Defender for Office 365<\/li>\n<p>  <\/p>\n<li>Automated Investigation and Response (AIR)<\/li>\n<p>  <\/ul>\n<p><b>What will happen:<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li><b>Manual refresh replaces auto-refresh:<\/b><br \/> \n<ul>  <\/p>\n<li>The AIR Investigations page will no longer refresh automatically.<\/li>\n<p>  <\/p>\n<li>A new <b>Refresh<\/b> button will be available on the Investigations page.<\/li>\n<p>  <\/p>\n<li>Analysts must manually refresh the page to obtain the latest investigation status and details.<\/li>\n<p>  <\/p>\n<li>This change is enabled by default as part of the service update.<\/li>\n<p>  <\/p>\n<li>Improved page responsiveness and reduced background network calls are expected.<\/li>\n<p>  <\/ul>\n<p>  <\/li>\n<li><b>Simplified investigation names:<\/b><br \/> \n<ul>  <\/p>\n<li>Investigation names for Manual and User-Reported will no longer include email subject lines<\/li>\n<p>  <\/p>\n<li>Generic investigation names will be displayed instead, such as:<br \/> \n<ul>  <\/p>\n<li><b>Email investigation for &#8216;Network message Id&#8221;<\/b><\/li>\n<p>  <\/p>\n<li><b>User reported message as malicious &#8220;Network message Id&#8221;<\/b><\/li>\n<p>  <\/ul>\n<p>  <\/li>\n<p>  <\/p>\n<li>Existing investigation history and results remain unchanged.<\/li>\n<p>  <\/ul>\n<p>  <\/li>\n<li><b>No changes to existing capabilities<\/b><br \/> \n<ul>  <\/p>\n<li>Investigation triggers remain unchanged.<\/li>\n<p>  <\/p>\n<li>Detection logic remains unchanged.<\/li>\n<p>  <\/p>\n<li>Automated remediation actions remain unchanged.<\/li>\n<p>  <\/p>\n<li>Threat Explorer functionality remains unchanged.<\/li>\n<p>  <\/p>\n<li>Email &amp; Collaboration reports remain unchanged.<\/li>\n<p>  <\/p>\n<li>Historical investigation records remain available.<\/li>\n<p>  <\/ul>\n<p>  <\/li>\n<p>  <\/ul>\n<p><b>[Action Required\/Recommendations:]<\/b><\/p>\n<p><b>No mandatory administrative configuration is required.<\/b><\/p>\n<p>Recommended actions:<\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li>Review SOC workflows that rely on automatic refresh behavior.<\/li>\n<p>  <\/p>\n<li>Inform security analysts that investigation status updates now require use of the new  <b>Refresh<\/b> button.<\/li>\n<p>  <\/p>\n<li>Review automation, runbooks, scripts, dashboards, or integrations that may parse investigation names.<\/li>\n<p>  <\/p>\n<li>Update internal SOPs, analyst guides, and training materials that reference investigation names containing email subjects.<\/li>\n<p>  <\/p>\n<li>Communicate the naming convention change to help desk and security teams prior to rollout.<\/li>\n<p>  <\/p>\n<li>Validate any custom reporting processes that may depend on previous investigation naming formats.<\/li>\n<p>  <\/ul>\n<p><b>Learn more:<\/b> <a href=\"https:\/\/learn.microsoft.com\/defender-office-365\/air-view-investigation-results#view-investigation-details-from-air-in-defender-for-office-365-plan-2\" target=\"_blank\">  Details and results of AIR in Defender for Office 365 Plan 2 &#8211; Microsoft Defender for Office 365 | Microsoft Learn<\/a> (will be updated before rollout)<\/p>\n<p><b>[Compliance Considerations:]<\/b><\/p>\n<table>  <\/p>\n<tbody>\n<tr>  <\/p>\n<td><b>Area<\/b><\/td>\n<p>  <\/p>\n<td><b>Explanation<\/b><\/td>\n<p>  <\/tr>\n<p>  <\/p>\n<tr>  <\/p>\n<td>Existing customer data processing\/access<\/td>\n<p>  <\/p>\n<td>Investigation names will no longer expose email subjects, supporting data minimization and changing how investigation-related data is presented to administrators.<\/td>\n<p>  <\/tr>\n<p>  <\/p>\n<tr>  <\/p>\n<td>Admin monitoring and reporting<\/td>\n<p>  <\/p>\n<td>Organizations may need to update reporting, operational procedures, and investigation workflows that reference investigation names.<\/td>\n<p>  <\/tr>\n<p>  <\/tbody>\n<\/table>\n<\/td>\n<\/tr>\n<tr>\n<th>Machine Translation<\/th>\n<td>\n<p>2026\u5e748\u67086\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&nbsp;<\/p>\n<p><b>[\u4f55\u3068\u306a\u305c:]<\/b><\/p>\n<p>  <\/p>\n<p>Microsoft\u306fMicrosoft <b>Defender for Office 365<\/b>\u306e<b>\u81ea\u52d5\u8abf\u67fb\u30fb\u5fdc\u7b54(AIR)<\/b>\u4f53\u9a13\u3092\u5f37\u5316\u3057\u3001\u624b\u52d5\u30ea\u30d5\u30ec\u30c3\u30b7\u30e5\u6a5f\u80fd\u3092\u5c0e\u5165\u3057\u3001\u8abf\u67fb\u306e\u547d\u540d\u898f\u5247\u3092\u7c21\u7d20\u5316\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u5909\u66f4\u306b\u3088\u308a\u3001\u30dd\u30fc\u30bf\u30eb\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5411\u4e0a\u3057\u3001\u4e0d\u8981\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6d3b\u52d5\u3092\u6e1b\u3089\u3057\u3001\u8abf\u67fb\u540d\u304b\u3089\u30e1\u30fc\u30eb\u306e\u4ef6\u540d\u3084<b>\u30e6\u30fc\u30b6\u30fc\u30d7\u30ea\u30f3\u30b7\u30d1\u30eb\u540d(UPN)<\/b>\u3092\u524a\u9664\u3059\u308b\u3053\u3068\u3067\u30c7\u30fc\u30bf\u6700\u5c0f\u5316\u306e\u539f\u5247\u3092\u652f\u63f4\u3057\u307e\u3059\u3002<\/p>\n<p><b>[\u5c55\u958b\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb:]<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li>\u4e00\u822c\u7a3c\u50cd(\u4e16\u754c\u5c55\u958b):<b>2026\u5e748\u6708\u4e2d\u65ec<\/b>(\u4ee5\u524d&nbsp;\u306f7\u6708&nbsp;\u4e0b\u65ec)\u304b\u3089\u59cb\u307e\u308a\u3001<b>2026\u5e748\u6708\u4e0b\u65ec<\/b>\u307e\u3067\u306b\u5b8c\u4e86\u4e88\u5b9a\u3067\u3059<\/li>\n<p>  <\/ul>\n<p><b>[\u7d44\u7e54\u3078\u306e\u5f71\u97ff:]<\/b><\/p>\n<p><b>\u5f71\u97ff\u3092\u53d7\u3051\u308b\u4eba\u7269:<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u30bb\u30f3\u30bf\u30fc(SOC)\u30a2\u30ca\u30ea\u30b9\u30c8<\/li>\n<p>  <\/p>\n<li>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u7ba1\u7406\u8005<\/li>\n<p>  <\/p>\n<li>\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u5bfe\u5fdc\u8005<\/li>\n<p>  <\/p>\n<li><b>Microsoft Defender for Office 365 Plan 2 \/ E5 \u304a\u3088\u3073<\/b> AIR \u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u7d44\u7e54<\/li>\n<p>  <\/ul>\n<p><b>\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\/\u30b5\u30fc\u30d3\u30b9:<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li>Microsoft Defender \u30dd\u30fc\u30bf\u30eb<\/li>\n<p>  <\/p>\n<li>Microsoft Defender for Office 365<\/li>\n<p>  <\/p>\n<li>\u81ea\u52d5\u8abf\u67fb\u30fb\u5bfe\u5fdc(AIR)<\/li>\n<p>  <\/ul>\n<p><b>\u4eca\u5f8c\u306e\u5c55\u958b:<\/b><\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li><b>\u624b\u52d5\u30ea\u30d5\u30ec\u30c3\u30b7\u30e5\u304c\u81ea\u52d5\u30ea\u30d5\u30ec\u30c3\u30b7\u30e5\u306b\u4ee3\u308f\u308b:<\/b><br \/> \n<ul>  <\/p>\n<li>AIR\u8abf\u67fb\u30da\u30fc\u30b8\u306f\u81ea\u52d5\u7684\u306b\u66f4\u65b0\u3055\u308c\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n<p>  <\/p>\n<li>\u65b0\u3057\u3044 <b>\u30ea\u30d5\u30ec\u30c3\u30b7\u30e5<\/b> \u30dc\u30bf\u30f3\u304c\u8abf\u67fb\u30da\u30fc\u30b8\u306b\u767b\u5834\u3057\u307e\u3059\u3002<\/li>\n<p>  <\/p>\n<li>\u5206\u6790\u5b98\u306f\u6700\u65b0\u306e\u8abf\u67fb\u72b6\u6cc1\u3084\u8a73\u7d30\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306b\u624b\u52d5\u3067\u30da\u30fc\u30b8\u3092\u66f4\u65b0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<p>  <\/p>\n<li>\u3053\u306e\u5909\u66f4\u306f\u30b5\u30fc\u30d3\u30b9\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u306e\u4e00\u74b0\u3068\u3057\u3066\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u6709\u52b9\u5316\u3055\u308c\u307e\u3059\u3002<\/li>\n<p>  <\/p>\n<li>\u30da\u30fc\u30b8\u306e\u5fdc\u7b54\u6027\u306e\u5411\u4e0a\u3068\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901a\u8a71\u306e\u6e1b\u5c11\u304c\u671f\u5f85\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<p>  <\/ul>\n<p>  <\/li>\n<li><b>\u7c21\u7565\u5316\u3055\u308c\u305f\u8abf\u67fb\u540d:<\/b><br \/> \n<ul>  <\/p>\n<li>Manual\u304a\u3088\u3073User-Reported\u306e\u8abf\u67fb\u540d\u79f0\u306b\u306f\u3001\u30e1\u30fc\u30eb\u306e\u4ef6\u540d\u304c\u542b\u307e\u308c\u306a\u304f\u306a\u308a\u307e\u3059<\/li>\n<p>  <\/p>\n<li>\u4ee3\u308f\u308a\u306b\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u4e00\u822c\u7684\u306a\u8abf\u67fb\u540d\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002\n<ul>  <\/p>\n<li><b>\u300c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30e1\u30c3\u30bb\u30fc\u30b8ID\u300d\u306b\u95a2\u3059\u308b\u30e1\u30fc\u30eb\u8abf\u67fb<\/b><\/li>\n<p>  <\/p>\n<li><b>\u30e6\u30fc\u30b6\u30fc\u304c\u300c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30e1\u30c3\u30bb\u30fc\u30b8ID\u300d\u3068\u3057\u3066\u60aa\u610f\u306e\u3042\u308b\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u5831\u544a\u3057\u307e\u3057\u305f<\/b><\/li>\n<p>  <\/ul>\n<p>  <\/li>\n<p>  <\/p>\n<li>\u65e2\u5b58\u306e\u8abf\u67fb\u7d4c\u6b74\u3068\u7d50\u679c\u306f\u5909\u308f\u3063\u3066\u3044\u307e\u305b\u3093\u3002<\/li>\n<p>  <\/ul>\n<p>  <\/li>\n<li><b>\u65e2\u5b58\u306e\u6a5f\u80fd\u306b\u5909\u66f4\u306f\u3042\u308a\u307e\u305b\u3093<\/b><br \/> \n<ul>  <\/p>\n<li>\u8abf\u67fb\u306e\u30c8\u30ea\u30ac\u30fc\u306f\u5909\u66f4\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/li>\n<p>  <\/p>\n<li>\u691c\u77e5\u30ed\u30b8\u30c3\u30af\u306f\u5909\u66f4\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/li>\n<p>  <\/p>\n<li>\u81ea\u52d5\u4fee\u5fa9\u63aa\u7f6e\u306f\u5909\u66f4\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/li>\n<p>  <\/p>\n<li>\u8105\u5a01\u30a8\u30af\u30b9\u30d7\u30ed\u30fc\u30e9\u30fc\u306e\u6a5f\u80fd\u306f\u5909\u66f4\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/li>\n<p>  <\/p>\n<li>\u30e1\u30fc\u30eb\u304a\u3088\u3073\u30b3\u30e9\u30dc\u30ec\u30fc\u30b7\u30e7\u30f3\u30ec\u30dd\u30fc\u30c8\u306f\u5909\u66f4\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/li>\n<p>  <\/p>\n<li>\u904e\u53bb\u306e\u8abf\u67fb\u8a18\u9332\u306f\u4f9d\u7136\u3068\u3057\u3066\u5165\u624b\u53ef\u80fd\u3067\u3059\u3002<\/li>\n<p>  <\/ul>\n<p>  <\/li>\n<p>  <\/ul>\n<p><b>[\u5fc5\u8981\u306a\u884c\u52d5\/\u63a8\u5968\u4e8b\u9805:]<\/b><\/p>\n<p><b>\u5fc5\u9808\u306e\u7ba1\u7406\u8a2d\u5b9a\u306f\u5fc5\u8981\u3042\u308a\u307e\u305b\u3093\u3002<\/b><\/p>\n<p>\u63a8\u5968\u3055\u308c\u308b\u884c\u52d5:<\/p>\n<p>  <\/p>\n<ul>  <\/p>\n<li>\u81ea\u52d5\u30ea\u30d5\u30ec\u30c3\u30b7\u30e5\u52d5\u4f5c\u306b\u4f9d\u5b58\u3059\u308bSOC\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u3092\u898b\u76f4\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<p>  <\/p>\n<li>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30ca\u30ea\u30b9\u30c8\u306b\u5bfe\u3057\u3001\u8abf\u67fb\u72b6\u6cc1\u306e\u66f4\u65b0\u306b\u306f\u65b0\u3057\u3044 <b>\u30ea\u30d5\u30ec\u30c3\u30b7\u30e5<\/b> \u30dc\u30bf\u30f3\u306e\u4f7f\u7528\u304c\u5fc5\u8981\u306b\u306a\u308b\u3053\u3068\u3092\u77e5\u3089\u305b\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<p>  <\/p>\n<li>\u81ea\u52d5\u5316\u3001\u30e9\u30f3\u30d6\u30c3\u30af\u3001\u30b9\u30af\u30ea\u30d7\u30c8\u3001\u30c0\u30c3\u30b7\u30e5\u30dc\u30fc\u30c9\u3001\u307e\u305f\u306f\u8abf\u67fb\u540d\u3092\u89e3\u6790\u3067\u304d\u308b\u7d71\u5408\u3092\u30ec\u30d3\u30e5\u30fc\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<p>  <\/p>\n<li>\u8abf\u67fb\u540d\u306b\u30e1\u30fc\u30eb\u306e\u4ef6\u540d\u3092\u8a18\u8f09\u3057\u305f\u793e\u5185SOP\u3001\u30a2\u30ca\u30ea\u30b9\u30c8\u30ac\u30a4\u30c9\u3001\u7814\u4fee\u8cc7\u6599\u3092\u66f4\u65b0\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<p>  <\/p>\n<li>\u5c55\u958b\u524d\u306b\u3001\u547d\u540d\u898f\u5247\u306e\u5909\u66f4\u3092\u30d8\u30eb\u30d7\u30c7\u30b9\u30af\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30c1\u30fc\u30e0\u306b\u4f1d\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<p>  <\/p>\n<li>\u904e\u53bb\u306e\u8abf\u67fb\u547d\u540d\u5f62\u5f0f\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u30ab\u30b9\u30bf\u30e0\u5831\u544a\u30d7\u30ed\u30bb\u30b9\u306e\u691c\u8a3c\u3002<\/li>\n<p>  <\/ul>\n<p><b>\u8a73\u7d30\u306f\u3053\u3061\u3089:<\/b><a href=\"https:\/\/learn.microsoft.com\/defender-office-365\/air-view-investigation-results#view-investigation-details-from-air-in-defender-for-office-365-plan-2\" target=\"_blank\">Defender for Office 365\u30d7\u30e9\u30f32\u306b\u304a\u3051\u308bAIR\u306e\u8a73\u7d30\u3068\u7d50\u679c &#8211; Microsoft Defender for   Office 365 |Microsoft 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