{"id":18829,"date":"2026-10-08T06:02:02","date_gmt":"2026-10-07T21:02:02","guid":{"rendered":"https:\/\/m365jp.net\/?p=18829"},"modified":"2026-10-08T06:10:33","modified_gmt":"2026-10-07T21:10:33","slug":"servicerestored-dz1490573-microsoft-defender-xdr-some-admins-may-be-unable-to-access-the-action-center-in-the-microsoft-defender-portal","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-10-08-servicerestored-dz1490573-microsoft-defender-xdr-some-admins-may-be-unable-to-access-the-action-center-in-the-microsoft-defender-portal","title":{"rendered":"[serviceRestored] DZ1490573 | Microsoft Defender XDR | Some admins may be unable to access the Action center in the Microsoft Defender portal"},"content":{"rendered":"
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DZ1490573 | Microsoft Defender XDR | Some admins may be unable to access the Action center in the Microsoft Defender portal<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\n\n\n\n\n\n\n\n\n\n
Status<\/th>\nserviceRestored<\/td>\n<\/tr>\n
Classification<\/th>\nadvisory<\/td>\n<\/tr>\n
User Impact<\/th>\nAdmins may have been unable to access the Action center in the Microsoft Defender portal.<\/td>\n<\/tr>\n
Last Updated<\/th>\n10\/07\/2026 20:47:50<\/td>\n<\/tr>\n
Start Time<\/th>\n10\/07\/2026 17:01:44<\/td>\n<\/tr>\n
End Time<\/th>\n10\/07\/2026 19:00:00<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Some admins may be unable to access the Action center in the Microsoft Defender portal <\/p>\n

User impact: Admins may have been unable to access the Action center in the Microsoft Defender portal. <\/p>\n

More info: Admins reported that clicking on the Action center caused the page to stall and never load. <\/p>\n

Final status: We’ve completed our rollback of the update that introduced a failing component causing stalling and failures when accessing the Action center. We’ve validated with a subset of reporting users that impact is remediated. If users are still experiencing impact, we advise them to reload the page using Ctrl + F5 on PC or Cmd + Shift + R on Mac. Alternatively, users can close all browser windows and reopen their browser to ensure remediation. <\/p>\n

Scope of impact: Some admins may have been unable to access the Action center in the Microsoft Defender portal as the page stalled and never loaded. <\/p>\n

Start time: Wednesday, October 7, 2026, at 1:00 PM UTC <\/p>\n

End time: Wednesday, October 7, 2026, at 7:00 PM UTC <\/p>\n

Root cause: A recent update to migrate to a new code base for the Microsoft Defender portal contained a failing component that resulted in stalling and failures when admins attempted to access the Action center. <\/p>\n

Next steps:
– We’re analyzing the offending service update to determine why the potential for impact wasn’t caught during our internal update testing and validation phases. This analysis will help us to improve our update implementation process moving forward to help ensure similar impact scenarios don’t occur in the future.<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb:\u4e00\u90e8\u306e\u7ba1\u7406\u8005\u306fMicrosoft Defender\u30dd\u30fc\u30bf\u30eb\u306e\u30a2\u30af\u30b7\u30e7\u30f3\u30bb\u30f3\u30bf\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059 <\/p>\n

\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff:\u7ba1\u7406\u8005\u304cMicrosoft Defender\u30dd\u30fc\u30bf\u30eb\u306e\u30a2\u30af\u30b7\u30e7\u30f3\u30bb\u30f3\u30bf\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u304b\u3063\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 <\/p>\n

\u8a73\u7d30\u60c5\u5831:\u7ba1\u7406\u8005\u306b\u3088\u308b\u3068\u3001\u30a2\u30af\u30b7\u30e7\u30f3\u30bb\u30f3\u30bf\u30fc\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u30da\u30fc\u30b8\u304c\u505c\u6b62\u3057\u3001\u8aad\u307f\u8fbc\u307e\u308c\u306a\u3044\u3068\u5831\u544a\u3055\u308c\u3066\u3044\u307e\u3059\u3002 <\/p>\n

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\u5f71\u97ff\u7bc4\u56f2:\u4e00\u90e8\u306e\u7ba1\u7406\u8005\u306f\u3001\u30da\u30fc\u30b8\u304c\u505c\u6b62\u3057\u8aad\u307f\u8fbc\u307e\u308c\u306a\u304b\u3063\u305f\u305f\u3081\u3001Microsoft Defender\u30dd\u30fc\u30bf\u30eb\u306e\u30a2\u30af\u30b7\u30e7\u30f3\u30bb\u30f3\u30bf\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u304b\u3063\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 <\/p>\n

\u958b\u59cb\u6642\u9593:2026\u5e7410\u67087\u65e5\u6c34\u66dc\u65e5 \u5348\u5f8c1\u6642 UTC <\/p>\n

\u7d42\u4e86\u6642\u523b:2026\u5e7410\u67087\u65e5\u6c34\u66dc\u65e5 \u5348\u5f8c7\u6642 UTC <\/p>\n

\u6839\u672c\u539f\u56e0:Microsoft Defender\u30dd\u30fc\u30bf\u30eb\u306e\u65b0\u3057\u3044\u30b3\u30fc\u30c9\u30d9\u30fc\u30b9\u3078\u306e\u79fb\u884c\u3092\u76ee\u7684\u3068\u3057\u305f\u6700\u8fd1\u306e\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3067\u3001\u5931\u6557\u3057\u305f\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u542b\u307e\u308c\u3001\u7ba1\u7406\u8005\u304c\u30a2\u30af\u30b7\u30e7\u30f3\u30bb\u30f3\u30bf\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u305f\u969b\u306b\u505c\u6b62\u3084\u5931\u6557\u304c\u767a\u751f\u3057\u307e\u3057\u305f\u3002 <\/p>\n

\u6b21\u306e\u30b9\u30c6\u30c3\u30d7:
– \u554f\u984c\u3068\u306a\u308b\u30b5\u30fc\u30d3\u30b9\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3092\u5206\u6790\u3057\u3001\u5185\u90e8\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u306e\u30c6\u30b9\u30c8\u304a\u3088\u3073\u691c\u8a3c\u30d5\u30a7\u30fc\u30ba\u3067\u5f71\u97ff\u306e\u53ef\u80fd\u6027\u304c\u691c\u51fa\u3055\u308c\u306a\u304b\u3063\u305f\u7406\u7531\u3092\u8abf\u67fb\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u5206\u6790\u306b\u3088\u308a\u3001\u4eca\u5f8c\u306e\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u5b9f\u88c5\u30d7\u30ed\u30bb\u30b9\u3092\u6539\u5584\u3057\u3001\u540c\u69d8\u306e\u5f71\u97ff\u30b7\u30ca\u30ea\u30aa\u304c\u4eca\u5f8c\u8d77\u3053\u3089\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"

DZ1490573 | Microsoft Defender XDR | Some admins may be unable to access the Action center in the Microsoft De […]<\/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-18829","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/18829","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=18829"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/18829\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=18829"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=18829"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=18829"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}