{"id":11415,"date":"2025-05-05T05:01:05","date_gmt":"2025-05-04T20:01:05","guid":{"rendered":"https:\/\/m365jp.net\/?p=11415"},"modified":"2025-05-05T05:07:25","modified_gmt":"2025-05-04T20:07:25","slug":"investigating-ex1067552-exchange-online-some-users-may-have-potential-phishing-email-messages-sent-to-their-junk-folder-in-exchange-online-instead-of-quarantine","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2025-05-05-investigating-ex1067552-exchange-online-some-users-may-have-potential-phishing-email-messages-sent-to-their-junk-folder-in-exchange-online-instead-of-quarantine","title":{"rendered":"[investigating] EX1067552 | Exchange Online | Some users may have potential phishing email messages sent to their Junk folder in Exchange Online instead of quarantine"},"content":{"rendered":"
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EX1067552 | Exchange Online | Some users may have potential phishing email messages sent to their Junk folder in Exchange Online instead of quarantine<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\n\n\n\n\n\n\n\n\n\n
Status<\/th>\ninvestigating<\/td>\n<\/tr>\n
Classification<\/th>\nadvisory<\/td>\n<\/tr>\n
User Impact<\/th>\nUsers may have potential phishing email messages sent to their Junk folder in Exchange Online instead of quarantine.<\/td>\n<\/tr>\n
Last Updated<\/th>\n05\/04\/2025 19:55:17<\/td>\n<\/tr>\n
Start Time<\/th>\n05\/04\/2025 15:16:00<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Some users may have potential phishing email messages sent to their Junk folder in Exchange Online instead of quarantine<\/p>\n

User impact: Users may have potential phishing email messages sent to their Junk folder in Exchange Online instead of quarantine.<\/p>\n

Current status: We’ve identified via our automated monitoring system an issue with one of our Machine Learning (ML) models, which may be causing potential phishing email messages to be sent to users’ Junk folder in Exchange Online instead of quarantine. We’ve determined this issue was caused by a configuration issue with a specific component with one of our ML models, which is responsible for labelling high-confidence phishing email messages, causing some potential phishing email messages to be sent to the Junk folder instead of being quarantined. We’ve adjusted and are in the process of deploying the corrected model to resolve the issue. We anticipate the impact to new messages will be resolved by the time of our next scheduled communications update, after which we\u2019ll reprocess impacted messages to fully address the issue.<\/p>\n

Scope of impact: Some users whose email messages are processed through the offending ML model may have potential phishing email messages sent to their Junk folder in Exchange Online instead of quarantine.<\/p>\n

Start time: Sunday, May 4, 2025, at 3:16 PM UTC<\/p>\n

Root cause: A configuration issue with our Machine Learning (ML) classification model may be causing some potential phishing email messages to be sent to the Junk folder instead of being quarantined.<\/p>\n

Next update by: Sunday, May 4, 2025, at 9:00 PM UTC<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb: \u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u3001\u691c\u75ab\u3067\u306f\u306a\u304f Exchange Online \u306e\u8ff7\u60d1\u30e1\u30fc\u30eb \u30d5\u30a9\u30eb\u30c0\u30fc\u306b\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u8a50\u6b3a\u306e\u53ef\u80fd\u6027\u304c\u3042\u308b\u30e1\u30fc\u30eb \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff: \u30e6\u30fc\u30b6\u30fc\u306f\u3001\u691c\u75ab\u3067\u306f\u306a\u304f\u3001Exchange Online\u306e\u8ff7\u60d1\u30e1\u30fc\u30eb \u30d5\u30a9\u30eb\u30c0\u30fc\u306b\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0 \u30e1\u30fc\u30eb \u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u9001\u4fe1\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u73fe\u5728\u306e\u30b9\u30c6\u30fc\u30bf\u30b9: \u81ea\u52d5\u76e3\u8996\u30b7\u30b9\u30c6\u30e0\u3092\u901a\u3058\u3066\u3001\u6a5f\u68b0\u5b66\u7fd2 (ML) \u30e2\u30c7\u30eb\u306e 1 \u3064\u306b\u554f\u984c\u304c\u3042\u308a\u3001\u691c\u75ab\u3067\u306f\u306a\u304f Exchange Online \u306e\u30e6\u30fc\u30b6\u30fc\u306e\u8ff7\u60d1\u30e1\u30fc\u30eb \u30d5\u30a9\u30eb\u30c0\u30fc\u306b\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0 \u30e1\u30fc\u30eb \u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u9001\u4fe1\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3057\u305f\u3002\u3053\u306e\u554f\u984c\u306f\u3001\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0 \u30e1\u30fc\u30eb \u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30e9\u30d9\u30eb\u4ed8\u3051\u3092\u62c5\u5f53\u3059\u308b ML \u30e2\u30c7\u30eb\u306e 1 \u3064\u3092\u6301\u3064\u7279\u5b9a\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u69cb\u6210\u306e\u554f\u984c\u304c\u539f\u56e0\u3067\u3001\u4e00\u90e8\u306e\u6f5c\u5728\u7684\u306a\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0 \u30e1\u30fc\u30eb \u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u691c\u75ab\u3055\u308c\u305a\u306b\u8ff7\u60d1\u30e1\u30fc\u30eb \u30d5\u30a9\u30eb\u30c0\u30fc\u306b\u9001\u4fe1\u3055\u308c\u308b\u3053\u3068\u304c\u539f\u56e0\u3067\u3042\u308b\u3068\u5224\u65ad\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b\u3001\u4fee\u6b63\u3055\u308c\u305f\u30e2\u30c7\u30eb\u3092\u8abf\u6574\u3057\u3001\u30c7\u30d7\u30ed\u30a4\u3092\u9032\u3081\u3066\u3044\u307e\u3059\u3002\u65b0\u3057\u3044\u30e1\u30c3\u30bb\u30fc\u30b8\u3078\u306e\u5f71\u97ff\u306f\u3001\u6b21\u56de\u306e\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u3055\u308c\u305f\u901a\u4fe1\u66f4\u65b0\u307e\u3067\u306b\u89e3\u6c7a\u3055\u308c\u308b\u4e88\u5b9a\u3067\u3042\u308a\u3001\u305d\u306e\u5f8c\u3001\u5f71\u97ff\u3092\u53d7\u3051\u308b\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u518d\u51e6\u7406\u3057\u3066\u554f\u984c\u306b\u5b8c\u5168\u306b\u5bfe\u51e6\u3057\u307e\u3059\u3002<\/p>\n

\u5f71\u97ff\u7bc4\u56f2: \u554f\u984c\u306e\u3042\u308b ML \u30e2\u30c7\u30eb\u3092\u901a\u3058\u3066\u96fb\u5b50\u30e1\u30fc\u30eb \u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u51e6\u7406\u3055\u308c\u308b\u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u3001\u691c\u75ab\u3067\u306f\u306a\u304f Exchange Online \u306e\u8ff7\u60d1\u30e1\u30fc\u30eb \u30d5\u30a9\u30eb\u30c0\u30fc\u306b\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0 \u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u9001\u4fe1\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u958b\u59cb\u6642\u9593: 2025 \u5e74 5 \u6708 4 \u65e5\u65e5\u66dc\u65e5\u306e\u5348\u5f8c 3 \u6642 16 \u5206 (UTC)<\/p>\n

\u6839\u672c\u539f\u56e0: \u6a5f\u68b0\u5b66\u7fd2 (ML) \u5206\u985e\u30e2\u30c7\u30eb\u306e\u69cb\u6210\u306e\u554f\u984c\u306b\u3088\u308a\u3001\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u306e\u53ef\u80fd\u6027\u306e\u3042\u308b\u30e1\u30fc\u30eb \u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u691c\u75ab\u3055\u308c\u305a\u306b\u8ff7\u60d1\u30e1\u30fc\u30eb \u30d5\u30a9\u30eb\u30c0\u30fc\u306b\u9001\u4fe1\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u6b21\u306e\u66f4\u65b0\u8005: 2025\u5e745\u67084\u65e5(\u65e5)21:00 UTC<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

EX1067552 | Exchange Online | Some users may have potential phishing email messages sent to their Junk folder […]<\/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-11415","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/11415","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=11415"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/11415\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=11415"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=11415"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=11415"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}