{"id":15961,"date":"2026-04-16T09:01:19","date_gmt":"2026-04-16T00:01:19","guid":{"rendered":"https:\/\/m365jp.net\/?p=15961"},"modified":"2026-04-16T09:01:43","modified_gmt":"2026-04-16T00:01:43","slug":"mc1281506-planned-breaking-changes-to-asim-kql-functions-used-by-microsoft-sentinel-for-developers","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-04-16-mc1281506-planned-breaking-changes-to-asim-kql-functions-used-by-microsoft-sentinel-for-developers","title":{"rendered":"MC1281506 | Planned breaking changes to ASIM KQL functions used by Microsoft Sentinel for Developers"},"content":{"rendered":"<div class=\"postie-post\">\n<div>\n<hr>\n<table id=\"section\">\n<tbody>\n<tr>\n<th width=\"95%\">MC1281506 | Planned breaking changes to ASIM KQL functions used by Microsoft Sentinel for Developers<\/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>04\/15\/2026 23:32:17<\/td>\n<\/tr>\n<tr>\n<th>Start Time<\/th>\n<td>04\/15\/2026 23:30:48<\/td>\n<\/tr>\n<tr>\n<th>End Time<\/th>\n<td>05\/15\/2026 23:30:48<\/td>\n<\/tr>\n<tr>\n<th>Action Required By Date<\/th>\n<td>2026-04-24T07:00:00Z<\/td>\n<\/tr>\n<tr>\n<th>Message Content<\/th>\n<td>\n<p><b>[Introduction]<\/b><\/p>\n<p>We\u2019re making <b>planned breaking changes<\/b> to some <b>Advanced Security Information Model (ASIM) KQL functions<\/b> used in  <i>Microsoft Sentinel for Developers<\/i>. These changes align parameters with documentation to improve consistency and performance.<\/p>\n<p><b>[When this will happen]<\/b><\/p>\n<p>Rollout timing has not been finalized.<\/p>\n<p>We\u2019ll update this Message center post with specific start and end dates once they\u2019re confirmed.<\/p>\n<p><b>[How this affects your organization]<\/b><\/p>\n<p><i>Who is affected<\/i><\/p>\n<ul>\n<li>Organizations using ASIM or normalization KQL functions in <i>Microsoft Sentinel for Developers<\/i><\/li>\n<li>Security teams and partners building or maintaining detections and analytic rules that rely on these functions<\/li>\n<\/ul>\n<p><i>What will happen (April 19)<\/i><\/p>\n<ul>\n<li>We will update _Im_ProcessCreate with the correct parameter, so that it will take both targetusername and targetusername_has.  <\/li>\n<li>This will give time to partners to update their detections and KQL queries to switch to the parameter name targetusername_has, while not break any existing experiences.<\/li>\n<\/ul>\n<p><i>What will happen (May 25 or later)<\/i><\/p>\n<ul>\n<li>Once we have given enough time and also checking with our usage telemetry that targetusername is not being used, we will remove targetusername as parameter.&nbsp;<\/li>\n<\/ul>\n<p><b>[What you can do to prepare]<\/b><\/p>\n<ul>\n<li>Review detections and analytic rules that use ASIM or normalization functions.<\/li>\n<li>Update queries to use <b>targetusername_has<\/b>.<\/li>\n<li>Test updated detections before rollout.<\/li>\n<li>Notify teams or partners who maintain Sentinel detections.<\/li>\n<\/ul>\n<p>Learn more:&nbsp;<a href=\"https:\/\/learn.microsoft.com\/azure\/sentinel\/normalization-schema-process-event\" target=\"_blank\">The Advanced Security Information Model (ASIM) Process Event normalization schema reference | Microsoft Sentinel | Security | Azure | Microsoft   Learn<\/a><\/p>\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><b>[\u306f\u3058\u3081\u306b]<\/b><\/p>\n<p>Microsoft <i>Sentinel for Developers<\/i>\u3067\u4f7f\u7528\u3055\u308c\u308bAdvanced <b>Security Information Model(ASIM)KQL\u6a5f\u80fd<\/b>\u306e\u4e00\u90e8\u306b\u5bfe\u3057\u3066<b>\u3001\u8a08\u753b\u7684\u306a\u91cd\u5927\u306a\u5909\u66f4<\/b>\u3092\u52a0\u3048\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u5909\u66f4\u306f\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3068\u6574\u5408\u3055\u305b\u3001\u4e00\u8cab\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002<\/p>\n<p><b>[\u3044\u3064\u8d77\u3053\u308b\u304b]<\/b><\/p>\n<p>\u5c55\u958b\u306e\u6642\u671f\u306f\u307e\u3060\u78ba\u5b9a\u3057\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n<p>\u958b\u59cb\u65e5\u3068\u7d42\u4e86\u65e5\u304c\u78ba\u5b9a\u6b21\u7b2c\u3001\u3053\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u30bb\u30f3\u30bf\u30fc\u306e\u6295\u7a3f\u3092\u66f4\u65b0\u3057\u307e\u3059\u3002<\/p>\n<p><b>[\u3053\u308c\u304c\u3042\u306a\u305f\u306e\u7d44\u7e54\u306b\u4e0e\u3048\u308b\u5f71\u97ff]<\/b><\/p>\n<p><i>\u5f71\u97ff\u3092\u53d7\u3051\u308b\u4eba\u7269<\/i><\/p>\n<ul>\n<li>ASIM\u307e\u305f\u306f\u6b63\u898f\u5316\u3092\u4f7f\u7528\u3059\u308b\u7d44\u7e54 <i>Microsoft Sentinel for Developers<\/i>\u306eKQL\u6a5f\u80fd<\/li>\n<li>\u3053\u308c\u3089\u306e\u6a5f\u80fd\u306b\u4f9d\u5b58\u3059\u308b\u691c\u77e5\u3084\u5206\u6790\u30eb\u30fc\u30eb\u3092\u69cb\u7bc9\u3059\u308b\u304b\u7dad\u6301\u3059\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30c1\u30fc\u30e0\u3084\u30d1\u30fc\u30c8\u30ca\u30fc<\/li>\n<\/ul>\n<p><i>\u4f55\u304c\u8d77\u3053\u308b\u304b(4\u670819\u65e5)<\/i><\/p>\n<ul>\n<li>\u6b63\u3057\u3044\u30d1\u30e9\u30e1\u30fc\u30bf\u3067_Im_ProcessCreate\u3092\u66f4\u65b0\u3057\u3001targetusername\u3068targetusername_has\u306e\u4e21\u65b9\u3092\u53d7\u3051\u5165\u308c\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002  <\/li>\n<li>\u3053\u308c\u306b\u3088\u308a\u3001\u30d1\u30fc\u30c8\u30ca\u30fc\u306f\u691c\u51fa\u3084KQL\u30af\u30a8\u30ea\u3092\u30d1\u30e9\u30e1\u30fc\u30bf\u540dtargetusername_has\u306b\u5207\u308a\u66ff\u3048\u308b\u6642\u9593\u3092\u78ba\u4fdd\u3067\u304d\u307e\u3059\u304c\u3001\u65e2\u5b58\u306e\u7d4c\u9a13\u3092\u58ca\u3059\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<\/ul>\n<p><i>\u4eca\u5f8c\u306e\u5c55\u958b(5\u670825\u65e5\u4ee5\u964d)<\/i><\/p>\n<ul>\n<li>\u5341\u5206\u306a\u6642\u9593\u3092\u304b\u3051\u3001\u4f7f\u7528\u72b6\u6cc1\u306e\u30c6\u30ec\u30e1\u30c8\u30ea\u3067targetusername\u304c\u4f7f\u308f\u308c\u3066\u3044\u306a\u3044\u304b\u78ba\u8a8d\u3057\u305f\u3089\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u304b\u3089Targetusername\u3092\u524a\u9664\u3057\u307e\u3059\u3002&nbsp;<\/li>\n<\/ul>\n<p><b>\u3010\u6e96\u5099\u306e\u305f\u3081\u306b\u3067\u304d\u308b\u3053\u3068\u3011<\/b><\/p>\n<ul>\n<li>ASIM\u3084\u6b63\u898f\u5316\u95a2\u6570\u3092\u7528\u3044\u305f\u691c\u51fa\u3084\u89e3\u6790\u30eb\u30fc\u30eb\u3092\u30ec\u30d3\u30e5\u30fc\u3057\u307e\u3059\u3002<\/li>\n<li>\u30af\u30a8\u30ea\u3092\u66f4\u65b0\u3057\u3066 <b>targetusername_has<\/b>\u3002<\/li>\n<li>\u5c0e\u5165\u524d\u306b\u6700\u65b0\u306e\u691c\u51fa\u3092\u30c6\u30b9\u30c8\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li>\u30bb\u30f3\u30c1\u30cd\u30eb\u691c\u77e5\u3092\u7dad\u6301\u3059\u308b\u30c1\u30fc\u30e0\u3084\u30d1\u30fc\u30c8\u30ca\u30fc\u306b\u901a\u77e5\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ul>\n<p>\u8a73\u7d30\u306f\u3053\u3061\u3089:&nbsp;<a href=\"https:\/\/learn.microsoft.com\/azure\/sentinel\/normalization-schema-process-event\" target=\"_blank\">Advanced Security Information Model(ASIM)\u30d7\u30ed\u30bb\u30b9\u30a4\u30d9\u30f3\u30c8\u6b63\u898f\u5316\u30b9\u30ad\u30fc\u30de\u53c2\u8003\u6587\u732e |Microsoft Sentinel |\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3|Azure |Microsoft Learn<\/a><\/p>\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\u8003\u616e\u4e8b\u9805\u306f\u7279\u5b9a\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002\u3042\u306a\u305f\u306e\u7d44\u7e54\u306b\u5fdc\u3058\u3066\u30ec\u30d3\u30e5\u30fc\u3092\u884c\u3063\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>MC1281506 | Planned breaking changes to ASIM KQL functions used by Microsoft Sentinel for Developers Classific [&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-15961","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/15961","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=15961"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/15961\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=15961"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=15961"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=15961"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}