{"id":11425,"date":"2025-05-06T03:01:21","date_gmt":"2025-05-05T18:01:21","guid":{"rendered":"https:\/\/m365jp.net\/?p=11425"},"modified":"2025-05-06T03:02:55","modified_gmt":"2025-05-05T18:02:55","slug":"servicerestored-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\/2025-05-06-servicerestored-ex1067552-exchange-online-some-users-may-have-potential-phishing-email-messages-sent-to-their-junk-folder-in-exchange-online-instead-of-quarantine","title":{"rendered":"[serviceRestored] 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>\nserviceRestored<\/td>\n<\/tr>\n
Classification<\/th>\nadvisory<\/td>\n<\/tr>\n
User Impact<\/th>\nUsers may have had potential phishing email messages sent to their Junk folder in Exchange Online instead of quarantine.<\/td>\n<\/tr>\n
Last Updated<\/th>\n05\/05\/2025 17:30:50<\/td>\n<\/tr>\n
Start Time<\/th>\n05\/04\/2025 15:16:00<\/td>\n<\/tr>\n
End Time<\/th>\n05\/04\/2025 23:20:00<\/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 had potential phishing email messages sent to their Junk folder in Exchange Online instead of quarantine.<\/p>\n

Final status: Following the deployment of the corrected model and resubmission of all email impacted during this event through the corrected model, our internal telemetry has verified that our ML model configuration changes have remediated the impact.<\/p>\n

Scope of impact: Some users whose email messages were processed through the offending ML model may have had 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

End time: Sunday, May 4, 2025, at 11:20 PM UTC<\/p>\n

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

Next steps:
– We’re further analyzing our ML classification model configuration procedures to identify how it entered this state and areas for improvement to help prevent similar problems in the future.<\/p>\n

This is the final update for the event.<\/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\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u6700\u7d42\u7684\u306a\u30b9\u30c6\u30fc\u30bf\u30b9: \u4fee\u6b63\u3055\u308c\u305f\u30e2\u30c7\u30eb\u306e\u30c7\u30d7\u30ed\u30a4\u3068\u3001\u3053\u306e\u30a4\u30d9\u30f3\u30c8\u4e2d\u306b\u5f71\u97ff\u3092\u53d7\u3051\u305f\u3059\u3079\u3066\u306e\u30e1\u30fc\u30eb\u3092\u4fee\u6b63\u3055\u308c\u305f\u30e2\u30c7\u30eb\u3092\u901a\u3058\u3066\u518d\u9001\u4fe1\u3057\u305f\u5f8c\u3001\u5185\u90e8\u30c6\u30ec\u30e1\u30c8\u30ea\u306b\u3088\u308a\u3001ML \u30e2\u30c7\u30eb\u306e\u69cb\u6210\u5909\u66f4\u306b\u3088\u3063\u3066\u5f71\u97ff\u304c\u4fee\u5fa9\u3055\u308c\u305f\u3053\u3068\u304c\u78ba\u8a8d\u3055\u308c\u307e\u3057\u305f\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\u305f\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\u305f\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

\u7d42\u4e86\u6642\u523b: 2025 \u5e74 5 \u6708 4 \u65e5 (\u65e5) 11:20 PM 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\u4e00\u90e8\u306e\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u96fb\u5b50\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\u30b9\u30c6\u30c3\u30d7:
– ML \u5206\u985e\u30e2\u30c7\u30eb\u306e\u8a2d\u5b9a\u624b\u9806\u3092\u3055\u3089\u306b\u5206\u6790\u3057\u3066\u3001\u3053\u306e\u72b6\u614b\u306b\u306a\u3063\u305f\u7d4c\u7def\u3068\u3001\u4eca\u5f8c\u540c\u69d8\u306e\u554f\u984c\u3092\u9632\u3050\u305f\u3081\u306e\u6539\u5584\u9818\u57df\u3092\u7279\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u3053\u308c\u306f\u30a4\u30d9\u30f3\u30c8\u306e\u6700\u7d42\u66f4\u65b0\u3067\u3059\u3002<\/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-11425","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/11425","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=11425"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/11425\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=11425"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=11425"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=11425"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}