{"id":18100,"date":"2026-08-27T04:01:33","date_gmt":"2026-08-26T19:01:33","guid":{"rendered":"https:\/\/m365jp.net\/?p=18100"},"modified":"2026-08-27T04:03:17","modified_gmt":"2026-08-26T19:03:17","slug":"servicedegradation-ex1458145-exchange-online-users-may-be-unable-to-complete-mailbox-offboarding-because-the-migration-task-is-blocked-and-cant-finish","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-08-27-servicedegradation-ex1458145-exchange-online-users-may-be-unable-to-complete-mailbox-offboarding-because-the-migration-task-is-blocked-and-cant-finish","title":{"rendered":"[serviceDegradation] EX1458145 | Exchange Online | Users may be unable to complete mailbox offboarding because the migration task is blocked and can\u2019t finish"},"content":{"rendered":"
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EX1458145 | Exchange Online | Users may be unable to complete mailbox offboarding because the migration task is blocked and can\u2019t finish<\/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>\nUsers may be unable to complete mailbox offboarding because the migration task is blocked and can\u2019t finish.<\/td>\n<\/tr>\n
Last Updated<\/th>\n08\/26\/2026 18:53:24<\/td>\n<\/tr>\n
Start Time<\/th>\n08\/20\/2026 12:23:15<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Users may be unable to complete mailbox offboarding because the migration task is blocked and can\u2019t finish <\/p>\n

User impact: Users may be unable to complete mailbox offboarding because the migration task is blocked and can\u2019t finish. <\/p>\n

Current status: We’ve initiated release of the subsequent fix and users should see relief as it progresses. We’ll expect to provide a complete remediation timeline by the next scheduled update. <\/p>\n

Scope of impact: Users attempting to complete mailbox offboarding in Exchange Online may be impacted by this issue. This section may be updated as our investigation continues. <\/p>\n

Root cause: The mailbox migration task is being delayed due to the integrity validation process remaining pending at the completion stage, resulting in impact. <\/p>\n

Next update by: Thursday, August 27, 2026, at 7:30 PM UTC<\/td>\n<\/tr>\n

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