{"id":14705,"date":"2026-01-28T22:01:12","date_gmt":"2026-01-28T13:01:12","guid":{"rendered":"https:\/\/m365jp.net\/?p=14705"},"modified":"2026-01-28T22:03:26","modified_gmt":"2026-01-28T13:03:26","slug":"servicerestored-ex1223427-exchange-online-some-users-may-have-been-unable-to-access-the-exchange-admin-center-eac","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-01-28-servicerestored-ex1223427-exchange-online-some-users-may-have-been-unable-to-access-the-exchange-admin-center-eac","title":{"rendered":"[serviceRestored] EX1223427 | Exchange Online | Some users may have been unable to access the Exchange admin center (EAC)"},"content":{"rendered":"
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EX1223427 | Exchange Online | Some users may have been unable to access the Exchange admin center (EAC)<\/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 been unable to access the EAC.<\/td>\n<\/tr>\n
Last Updated<\/th>\n01\/28\/2026 12:43:09<\/td>\n<\/tr>\n
Start Time<\/th>\n01\/28\/2026 09:06:00<\/td>\n<\/tr>\n
End Time<\/th>\n01\/28\/2026 11:12:00<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Some users may have been unable to access the Exchange admin center (EAC)<\/p>\n

User impact: Users may have been unable to access the EAC.<\/p>\n

Final status: We’ve identified that a section of infrastructure, responsible for facilitating EAC access, unexpectedly began performing below acceptable performance thresholds and caused impact. We’ve redirected affected traffic to alternate healthy infrastructure and confirmed impact is no longer occurring after a period of monitoring.<\/p>\n

Scope of impact: Impact was specific to some users who were served through the affected infrastructure attempting to access the EAC.<\/p>\n

Start time: Wednesday, January 28, 2026, at 9:06 AM UTC<\/p>\n

End time: Wednesday, January 28, 2026, at 11:12 AM UTC<\/p>\n

Root cause: A section of infrastructure, responsible for facilitating EAC access, unexpectedly began performing below acceptable performance thresholds and caused impact.<\/p>\n

Next steps:
– We’re reviewing performance data and trends on the affected systems to help prevent similar impact from happening again.<\/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\u306fExchange\u7ba1\u7406\u30bb\u30f3\u30bf\u30fc(EAC)\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u304b\u3063\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff:\u30e6\u30fc\u30b6\u30fc\u304cEAC\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u304b\u3063\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u6700\u7d42\u72b6\u6cc1:EAC\u30a2\u30af\u30bb\u30b9\u3092\u5186\u6ed1\u306b\u9032\u3081\u308b\u30a4\u30f3\u30d5\u30e9\u306e\u4e00\u90e8\u304c\u4e88\u671f\u305b\u305a\u8a31\u5bb9\u7bc4\u56f2\u3092\u4e0b\u56de\u308a\u3001\u5f71\u97ff\u304c\u751f\u3058\u305f\u3053\u3068\u3092\u7279\u5b9a\u3057\u307e\u3057\u305f\u3002\u5f71\u97ff\u3092\u53d7\u3051\u305f\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u5225\u306e\u5065\u5168\u306a\u30a4\u30f3\u30d5\u30e9\u306b\u8fc2\u56de\u3057\u3001\u4e00\u5b9a\u671f\u9593\u306e\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u306e\u7d50\u679c\u3001\u5f71\u97ff\u306f\u3082\u306f\u3084\u767a\u751f\u3057\u3066\u3044\u306a\u3044\u3053\u3068\u304c\u78ba\u8a8d\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n

\u5f71\u97ff\u306e\u7bc4\u56f2:\u5f71\u97ff\u306f\u3001\u5f71\u97ff\u3092\u53d7\u3051\u305f\u30a4\u30f3\u30d5\u30e9\u3092\u901a\u3058\u3066EAC\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u305f\u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u7279\u5316\u3057\u307e\u3057\u305f\u3002<\/p>\n

\u958b\u59cb\u6642\u9593:2026\u5e741\u670828\u65e5\u6c34\u66dc\u65e5 \u5348\u524d9\u664206\u5206 UTC<\/p>\n

\u7d42\u4e86\u6642\u523b:2026\u5e741\u670828\u65e5\u6c34\u66dc\u65e5 \u5348\u524d11\u664212\u5206 UTC<\/p>\n

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\u6b21\u306e\u30b9\u30c6\u30c3\u30d7:
– \u5f71\u97ff\u3092\u53d7\u3051\u305f\u30b7\u30b9\u30c6\u30e0\u306e\u6027\u80fd\u30c7\u30fc\u30bf\u3068\u50be\u5411\u3092\u898b\u76f4\u3057\u3001\u540c\u69d8\u306e\u5f71\u97ff\u304c\u518d\u767a\u3057\u306a\u3044\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u3053\u308c\u304c\u30a4\u30d9\u30f3\u30c8\u306e\u6700\u7d42\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3067\u3059\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

EX1223427 | Exchange Online | Some users may have been unable to access the Exchange admin center (EAC) Status […]<\/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-14705","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14705","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=14705"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14705\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=14705"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=14705"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=14705"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}