{"id":15596,"date":"2026-03-27T02:00:56","date_gmt":"2026-03-26T17:00:56","guid":{"rendered":"https:\/\/m365jp.net\/?p=15596"},"modified":"2026-03-27T02:04:06","modified_gmt":"2026-03-26T17:04:06","slug":"servicedegradation-dz1261545-microsoft-defender-xdr-admins-may-see-delayed-or-missing-training-notifications-for-new-attack-simulation-training-ast-campaigns-in-defender-4","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-03-27-servicedegradation-dz1261545-microsoft-defender-xdr-admins-may-see-delayed-or-missing-training-notifications-for-new-attack-simulation-training-ast-campaigns-in-defender-4","title":{"rendered":"[serviceDegradation] DZ1261545 | Microsoft Defender XDR | Admins may see delayed or missing training notifications for new Attack Simulation Training (AST) campaigns in Defender"},"content":{"rendered":"
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DZ1261545 | Microsoft Defender XDR | Admins may see delayed or missing training notifications for new Attack Simulation Training (AST) campaigns in Defender<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\n\n\n\n\n\n\n\n\n\n
Status<\/th>\nserviceDegradation<\/td>\n<\/tr>\n
Classification<\/th>\nadvisory<\/td>\n<\/tr>\n
User Impact<\/th>\nAdmins may see delayed or missing training notifications for new AST campaigns in Microsoft Defender for Office 365.<\/td>\n<\/tr>\n
Last Updated<\/th>\n03\/26\/2026 16:43:07<\/td>\n<\/tr>\n
Start Time<\/th>\n03\/18\/2026 00:00:00<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Admins may see delayed or missing training notifications for new Attack Simulation Training (AST) campaigns in Defender<\/p>\n

User impact: Admins may see delayed or missing training notifications for new AST campaigns in Microsoft Defender for Office 365.<\/p>\n

More info: Admins reviewing the affected training campaigns see the following message which states, “This training campaign is in a scheduled state, please visit this page once the campaign has moved to an inprogress state.”<\/p>\n

Current status: Our initial projection which estimated the deployment would reach full saturation by the time of this update was incorrect and should have conveyed this timeline was for our internal test environment deployment. We expect the fix to begin saturating in the affected admins\u2019 environment tomorrow. We’re monitoring as the deployment progresses, and we’ll provide an updated timeline for remediation as one becomes available.<\/p>\n

Scope of impact: This incident impacts some admins, who may see delayed or missing training notifications for new AST campaigns in Microsoft Defender for Office 365. This section may be updated as the investigation progresses.<\/p>\n

Start time: Wednesday, March 18, 2026, at 12:00 AM UTC<\/p>\n

Root cause: A recent service update to Microsoft Defender introduced a code regression, resulting in impact.<\/p>\n

Next update by: Thursday, April 2, 2026, at 6:00 PM UTC<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb:\u7ba1\u7406\u8005\u306fDefender\u306e\u65b0\u3057\u3044\u653b\u6483\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0(AST)\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u306e\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u901a\u77e5\u304c\u9045\u5ef6\u307e\u305f\u306f\u4e0d\u5728\u306b\u8868\u793a\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff:\u7ba1\u7406\u8005\u306fMicrosoft Defender for Office 365\u306e\u65b0\u3057\u3044AST\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u306e\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u901a\u77e5\u304c\u9045\u308c\u305f\u308a\u6b20\u843d\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u8a73\u7d30\u60c5\u5831:\u5f71\u97ff\u3092\u53d7\u3051\u305f\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u3092\u78ba\u8a8d\u3057\u3066\u3044\u308b\u7ba1\u7406\u8005\u306f\u3001\u300c\u3053\u306e\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u306f\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u72b6\u614b\u306b\u3042\u308a\u307e\u3059\u3002\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u304c\u9032\u884c\u4e2d\u306e\u72b6\u614b\u306b\u79fb\u884c\u3057\u305f\u3089\u3001\u3053\u306e\u30da\u30fc\u30b8\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u300d\u3068\u8a18\u8f09\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u73fe\u72b6:\u3053\u306e\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u6642\u70b9\u3067\u5c55\u958b\u304c\u5b8c\u5168\u306b\u98fd\u548c\u306b\u9054\u3059\u308b\u3068\u898b\u7a4d\u3082\u3063\u3066\u3044\u305f\u5f53\u521d\u306e\u4e88\u6e2c\u306f\u8aa4\u308a\u3067\u3042\u308a\u3001\u3053\u306e\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u306f\u5185\u90e8\u30c6\u30b9\u30c8\u74b0\u5883\u306e\u5c55\u958b\u6642\u3067\u3042\u308b\u3053\u3068\u3092\u4f1d\u3048\u308b\u3079\u304d\u3067\u3057\u305f\u3002\u4fee\u6b63\u306f\u660e\u65e5\u304b\u3089\u5f71\u97ff\u3092\u53d7\u3051\u305f\u7ba1\u7406\u8005\u306e\u74b0\u5883\u306b\u6d78\u900f\u3057\u59cb\u3081\u308b\u898b\u8fbc\u307f\u3067\u3059\u3002\u5c55\u958b\u306e\u9032\u884c\u3092\u76e3\u8996\u3057\u3066\u304a\u308a\u3001\u5bfe\u5fdc\u306e\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u304c\u5165\u624b\u6b21\u7b2c\u3001\u66f4\u65b0\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n

\u5f71\u97ff\u7bc4\u56f2:\u3053\u306e\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u306f\u4e00\u90e8\u306e\u7ba1\u7406\u8005\u306b\u5f71\u97ff\u3092\u53ca\u307c\u3057\u3001Microsoft Defender for Office 365\u306e\u65b0\u3057\u3044AST\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u306e\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u901a\u77e5\u304c\u9045\u308c\u305f\u308a\u629c\u3051\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u306f\u8abf\u67fb\u306e\u9032\u5c55\u306b\u4f34\u3044\u66f4\u65b0\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u958b\u59cb\u6642\u9593:2026\u5e743\u670818\u65e5\u6c34\u66dc\u65e5 0:00 UTC<\/p>\n

\u6839\u672c\u539f\u56e0:Microsoft Defender\u306e\u6700\u8fd1\u306e\u30b5\u30fc\u30d3\u30b9\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3067\u30b3\u30fc\u30c9\u56de\u5e30\u304c\u767a\u751f\u3057\u3001\u5f71\u97ff\u304c\u751f\u3058\u307e\u3057\u305f\u3002<\/p>\n

\u6b21\u56de\u66f4\u65b0:2026\u5e744\u67082\u65e5\u6728\u66dc\u65e5 \u5348\u5f8c6\u6642 UTC<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

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