{"id":14203,"date":"2025-12-09T22:01:15","date_gmt":"2025-12-09T13:01:15","guid":{"rendered":"https:\/\/m365jp.net\/?p=14203"},"modified":"2025-12-09T22:06:07","modified_gmt":"2025-12-09T13:06:07","slug":"servicedegradation-dz1193516-microsoft-defender-xdr-some-admins-may-encounter-errors-when-accessing-microsoft-defender-for-endpoint-features-2","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2025-12-09-servicedegradation-dz1193516-microsoft-defender-xdr-some-admins-may-encounter-errors-when-accessing-microsoft-defender-for-endpoint-features-2","title":{"rendered":"[serviceDegradation] DZ1193516 | Microsoft Defender XDR | Some admins may encounter errors when accessing Microsoft Defender for Endpoint features"},"content":{"rendered":"
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DZ1193516 | Microsoft Defender XDR | Some admins may encounter errors when accessing Microsoft Defender for Endpoint features<\/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>\nincident<\/td>\n<\/tr>\n
User Impact<\/th>\nAdmins may encounter errors when accessing Microsoft Defender for Endpoint features.<\/td>\n<\/tr>\n
Last Updated<\/th>\n12\/09\/2025 12:05:30<\/td>\n<\/tr>\n
Start Time<\/th>\n12\/09\/2025 06:56:28<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Some admins may encounter errors when accessing Microsoft Defender for Endpoint features<\/p>\n

User impact: Admins may encounter errors when accessing Microsoft Defender for Endpoint features.<\/p>\n

More info: Admins and security operators may encounter errors and failures when accessing multiple pages specific to Microsoft Defender for Endpoint (MDE) in the Microsoft Defender portal. Impacted experiences include, but may not be limited to:<\/p>\n

– Device Inventory
– Threat Analytics
– Secure Score
– Machines API
– Other pages that depend on related APIs.<\/p>\n

In addition, API requests may return ‘431 Request Header Fields Too Large’ errors.<\/p>\n

Current status: We’ve determined that a recent MDE service update may be causing problems with how information is sent between systems, leading to errors. We\u2019re working to revert this change in an attempt to mitigate impact and to validate our root cause theory.<\/p>\n

Scope of impact: Admins and security operators attempting to access the MDE experiences listed above via the Microsoft Defender portal, or to make MDE API calls, may be impacted.<\/p>\n

Start time: Thursday, December 4, 2025, at 10:00 AM UTC<\/p>\n

Next update by: Tuesday, December 9, 2025, at 2:00 PM UTC<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb:\u4e00\u90e8\u306e\u7ba1\u7406\u8005\u306fMicrosoft Defender for Endpoint\u306e\u6a5f\u80fd\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u306b\u30a8\u30e9\u30fc\u306b\u906d\u9047\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff:\u7ba1\u7406\u8005\u306fMicrosoft Defender for Endpoint\u306e\u6a5f\u80fd\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u306b\u30a8\u30e9\u30fc\u306b\u906d\u9047\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u8a73\u7d30\u60c5\u5831:\u7ba1\u7406\u8005\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30aa\u30da\u30ec\u30fc\u30bf\u30fc\u306f\u3001Microsoft Defender for Endpoint(MDE)\u5c02\u7528\u306e\u8907\u6570\u306e\u30da\u30fc\u30b8\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u306b\u30a8\u30e9\u30fc\u3084\u5931\u6557\u306b\u906d\u9047\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u5f71\u97ff\u3092\u53d7\u3051\u308b\u7d4c\u9a13\u306b\u306f\u4ee5\u4e0b\u304c\u542b\u307e\u308c\u307e\u3059\u304c\u3001\u3053\u308c\u306b\u9650\u5b9a\u3055\u308c\u307e\u305b\u3093:<\/p>\n

– \u30c7\u30d0\u30a4\u30b9\u30a4\u30f3\u30d9\u30f3\u30c8\u30ea
– \u8105\u5a01\u5206\u6790
– \u30bb\u30ad\u30e5\u30a2\u30b9\u30b3\u30a2
– \u30de\u30b7\u30f3API
– \u95a2\u9023\u3059\u308bAPI\u306b\u4f9d\u5b58\u3059\u308b\u305d\u306e\u4ed6\u306e\u30da\u30fc\u30b8\u3002<\/p>\n

\u3055\u3089\u306b\u3001API\u30ea\u30af\u30a8\u30b9\u30c8\u3067\u306f\u300c431\u4ef6\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u30d8\u30c3\u30c0\u30fc\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u5927\u304d\u3059\u304e\u308b\u300d\u30a8\u30e9\u30fc\u304c\u8fd4\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u73fe\u72b6:\u6700\u8fd1\u306eMDE\u30b5\u30fc\u30d3\u30b9\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u304c\u30b7\u30b9\u30c6\u30e0\u9593\u306e\u60c5\u5831\u9001\u4fe1\u306b\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3057\u3001\u30a8\u30e9\u30fc\u3092\u5f15\u304d\u8d77\u3053\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3068\u5224\u65ad\u3057\u307e\u3057\u305f\u3002\u79c1\u305f\u3061\u306f\u3053\u306e\u5909\u66f4\u3092\u5143\u306b\u623b\u3057\u3001\u5f71\u97ff\u3092\u8efd\u6e1b\u3057\u3001\u6839\u672c\u539f\u56e0\u7406\u8ad6\u306e\u691c\u8a3c\u3092\u76ee\u6307\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u5f71\u97ff\u7bc4\u56f2:\u4e0a\u8a18\u306eMDE\u4f53\u9a13\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3059\u308b\u7ba1\u7406\u8005\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30aa\u30da\u30ec\u30fc\u30bf\u30fc\u304cMicrosoft Defender\u30dd\u30fc\u30bf\u30eb\u3092\u901a\u3058\u3066\u5229\u7528\u3057\u305f\u308a\u3001MDE API\u547c\u3073\u51fa\u3057\u3092\u884c\u3046\u5834\u5408\u3001\u5f71\u97ff\u3092\u53d7\u3051\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u958b\u59cb\u6642\u9593:2025\u5e7412\u67084\u65e5\u6728\u66dc\u65e5 \u5348\u524d10\u6642 UTC<\/p>\n

\u6b21\u56de\u66f4\u65b0:2025\u5e7412\u67089\u65e5\u706b\u66dc\u65e5 \u5348\u5f8c2:00 UTC<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

DZ1193516 | Microsoft Defender XDR | Some admins may encounter errors when accessing Microsoft Defender for En […]<\/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-14203","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14203","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=14203"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14203\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=14203"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=14203"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=14203"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}