{"id":16100,"date":"2026-04-24T16:01:12","date_gmt":"2026-04-24T07:01:12","guid":{"rendered":"https:\/\/m365jp.net\/?p=16100"},"modified":"2026-04-24T16:01:22","modified_gmt":"2026-04-24T07:01:22","slug":"servicedegradation-ex1280763-exchange-online-admins-are-unable-to-progress-mailbox-migrations-in-exchange-online-6","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-04-24-servicedegradation-ex1280763-exchange-online-admins-are-unable-to-progress-mailbox-migrations-in-exchange-online-6","title":{"rendered":"[serviceDegradation] EX1280763 | Exchange Online | Admins are unable to progress mailbox migrations in Exchange Online"},"content":{"rendered":"
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EX1280763 | Exchange Online | Admins are unable to progress mailbox migrations in Exchange Online<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\n\n\n\n\n\n\n\n\n\n
Status<\/th>\nserviceDegradation<\/td>\n<\/tr>\n
Classification<\/th>\nadvisory<\/td>\n<\/tr>\n
User Impact<\/th>\nAdmins are unable to progress mailbox migrations in Exchange Online.<\/td>\n<\/tr>\n
Last Updated<\/th>\n04\/24\/2026 06:29:14<\/td>\n<\/tr>\n
Start Time<\/th>\n04\/15\/2026 08:36:58<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Admins are unable to progress mailbox migrations in Exchange Online<\/p>\n

User impact: Admins are unable to progress mailbox migrations in Exchange Online.<\/p>\n

More info: All mailbox onboarding and offboarding scenarios in Exchange Online, including Tenant to Tenant migrations remain in a syncing state.<\/p>\n

Current status: We\u2019re continuing to monitor the fix as it propagates throughout the affected infrastructure, where deployment has now reached 90 percent. We\u2019ll provide a resolution timeline once available.<\/p>\n

Scope of impact: All admins attempting mailbox migrations into or out of Exchange Online are impacted.<\/p>\n

Root cause: A recent service side update introduced an issue that’s causing migration jobs to fail, resulting in impact.<\/p>\n

Next update by: Monday, April 27, 2026, at 6:30 PM UTC<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb:\u7ba1\u7406\u8005\u304cExchange Online\u3067\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306e\u79fb\u884c\u3092\u9032\u3081\u3089\u308c\u307e\u305b\u3093<\/p>\n

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\u6b21\u56de\u66f4\u65b0:2026\u5e744\u670827\u65e5(\u6708)\u5348\u5f8c6\u664230\u5206 UTC<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

EX1280763 | Exchange Online | Admins are unable to progress mailbox migrations in Exchange Online Status servi […]<\/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-16100","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16100","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=16100"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16100\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=16100"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=16100"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=16100"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}