{"id":13475,"date":"2025-10-28T08:01:11","date_gmt":"2025-10-27T23:01:11","guid":{"rendered":"https:\/\/m365jp.net\/?p=13475"},"modified":"2025-10-28T08:03:59","modified_gmt":"2025-10-27T23:03:59","slug":"servicerestored-ex1102371-exchange-online-users-may-be-unable-to-access-some-exchange-online-archive-mailboxes","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2025-10-28-servicerestored-ex1102371-exchange-online-users-may-be-unable-to-access-some-exchange-online-archive-mailboxes","title":{"rendered":"[serviceRestored] EX1102371 | Exchange Online | Users may be unable to access some Exchange Online archive mailboxes"},"content":{"rendered":"
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EX1102371 | Exchange Online | Users may be unable to access some Exchange Online archive mailboxes<\/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 some Exchange Online archive mailboxes.<\/td>\n<\/tr>\n
Last Updated<\/th>\n10\/27\/2025 22:32:24<\/td>\n<\/tr>\n
Start Time<\/th>\n06\/23\/2025 13:00:00<\/td>\n<\/tr>\n
End Time<\/th>\n10\/27\/2025 22:00:00<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Users may be unable to access some Exchange Online archive mailboxes<\/p>\n

User impact: Users may have been unable to access some Exchange Online archive mailboxes.<\/p>\n

More info: This issue occurred when routine mailbox database maintenance for archive mailboxes relocated the archive to a different portion of Active Directory infrastructure from the primary mailbox. Impact may have persisted both during the maintenance move and after the move. The problem impacted archive mailbox access through any Exchange Online connection method.<\/p>\n

Final status: We’ve confirmed the fix has completed its deployment and been activated in all environments, confirming mitigation with affected users and service telemetry.<\/p>\n

Scope of impact: Any user attempting to access their Exchange Online archive mailbox may have encountered this issue if their primary and archive mailboxes weren’t located on the same portion of Active Directory infrastructure.<\/p>\n

Start time: Monday, June 23, 2025, at 1:00 PM UTC<\/p>\n

End time: Monday, October 27, 2025, at 10:00 PM UTC<\/p>\n

Root cause: As part of routine mailbox database maintenance, the affected archive mailboxes were migrated to a separate portion of database service infrastructure from the primary, preventing users from accessing the archive mailbox and causing impact.<\/p>\n

Next steps:
– We’re continuing our analysis of the impacting maintenance procedures to better identify and prevent similar impact 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: \u30e6\u30fc\u30b6\u30fc\u304c\u4e00\u90e8\u306e Exchange Online \u30a2\u30fc\u30ab\u30a4\u30d6 \u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\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: \u30e6\u30fc\u30b6\u30fc\u304c\u4e00\u90e8\u306e Exchange Online \u30a2\u30fc\u30ab\u30a4\u30d6 \u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

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\u6700\u7d42\u72b6\u614b: \u4fee\u6b63\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30c7\u30d7\u30ed\u30a4\u304c\u5b8c\u4e86\u3057\u3001\u3059\u3079\u3066\u306e\u74b0\u5883\u3067\u30a2\u30af\u30c6\u30a3\u30d6\u5316\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3001\u5f71\u97ff\u3092\u53d7\u3051\u308b\u30e6\u30fc\u30b6\u30fc\u3068\u30b5\u30fc\u30d3\u30b9 \u30c6\u30ec\u30e1\u30c8\u30ea\u306e\u8efd\u6e1b\u7b56\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002<\/p>\n

\u5f71\u97ff\u306e\u7bc4\u56f2: \u30d7\u30e9\u30a4\u30de\u30ea \u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u3068\u30a2\u30fc\u30ab\u30a4\u30d6 \u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u304c Active Directory \u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u306e\u540c\u3058\u90e8\u5206\u306b\u914d\u7f6e\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u3001Exchange Online \u30a2\u30fc\u30ab\u30a4\u30d6 \u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3059\u308b\u30e6\u30fc\u30b6\u30fc\u306f\u3001\u3053\u306e\u554f\u984c\u306b\u906d\u9047\u3057\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u958b\u59cb\u6642\u9593: 2025 \u5e74 6 \u6708 23 \u65e5\u6708\u66dc\u65e5\u5348\u5f8c 1:00 UTC<\/p>\n

\u7d42\u4e86\u6642\u523b: 2025 \u5e74 10 \u6708 27 \u65e5\u6708\u66dc\u65e5\u5348\u5f8c 10:00 UTC<\/p>\n

\u6839\u672c\u539f\u56e0: \u5b9a\u671f\u7684\u306a\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9 \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9 \u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u306e\u4e00\u74b0\u3068\u3057\u3066\u3001\u5f71\u97ff\u3092\u53d7\u3051\u308b\u30a2\u30fc\u30ab\u30a4\u30d6 \u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u304c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9 \u30b5\u30fc\u30d3\u30b9 \u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u306e\u30d7\u30e9\u30a4\u30de\u30ea\u3068\u306f\u5225\u306e\u90e8\u5206\u306b\u79fb\u884c\u3055\u308c\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u30a2\u30fc\u30ab\u30a4\u30d6 \u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u304f\u306a\u308a\u3001\u5f71\u97ff\u304c\u767a\u751f\u3057\u307e\u3057\u305f\u3002<\/p>\n

\u6b21\u306e\u30b9\u30c6\u30c3\u30d7:
– \u4eca\u5f8c\u540c\u69d8\u306e\u5f71\u97ff\u3092\u3088\u308a\u9069\u5207\u306b\u7279\u5b9a\u3057\u3001\u9632\u6b62\u3059\u308b\u305f\u3081\u306b\u3001\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u624b\u9806\u306e\u5206\u6790\u3092\u7d9a\u3051\u3066\u3044\u307e\u3059\u3002<\/p>\n

\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":"

EX1102371 | Exchange Online | Users may be unable to access some Exchange Online archive mailboxes Status serv […]<\/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-13475","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/13475","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=13475"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/13475\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=13475"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=13475"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=13475"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}