{"id":15900,"date":"2026-04-14T20:01:19","date_gmt":"2026-04-14T11:01:19","guid":{"rendered":"https:\/\/m365jp.net\/?p=15900"},"modified":"2026-04-14T20:06:30","modified_gmt":"2026-04-14T11:06:30","slug":"servicerestored-ex1213792-exchange-online-admins-couldnt-upgrade-groups-from-distribution-lists-to-unified-groups-using-powershell-or-the-exchange-admin-center","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-04-14-servicerestored-ex1213792-exchange-online-admins-couldnt-upgrade-groups-from-distribution-lists-to-unified-groups-using-powershell-or-the-exchange-admin-center","title":{"rendered":"[serviceRestored] EX1213792 | Exchange Online | Admins couldn\u2019t upgrade groups from Distribution Lists to Unified Groups using PowerShell or the Exchange admin center"},"content":{"rendered":"
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EX1213792 | Exchange Online | Admins couldn\u2019t upgrade groups from Distribution Lists to Unified Groups using PowerShell or the Exchange admin center<\/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>\nAdmins couldn\u2019t upgrade groups from Distribution Lists to Unified Groups using PowerShell or the Exchange admin center.<\/td>\n<\/tr>\n
Last Updated<\/th>\n04\/14\/2026 10:48:20<\/td>\n<\/tr>\n
Start Time<\/th>\n01\/06\/2026 06:49:02<\/td>\n<\/tr>\n
End Time<\/th>\n04\/08\/2026 04:33:00<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Admins couldn\u2019t upgrade groups from Distribution Lists to Unified Groups using PowerShell or the Exchange admin center<\/p>\n

User impact: Admins couldn\u2019t upgrade groups from Distribution Lists to Unified Groups using PowerShell or the Exchange admin center.<\/p>\n

Final status: We\u2019ve confirmed that the fix is fully deployed across all impacted environments. Admins can now use the New-UnifiedGroup cmdlet in PowerShell to convert Distribution Lists to Unified Groups. Admins who run the Upgrade-DistributionGroup cmdlet directly will continue to encounter failures. This cmdlet may be deprecated in the future.<\/p>\n

Scope of impact: Impact was specific to some admins attempting to upgrade groups from Distribution Lists to Unified Groups using PowerShell or the Exchange admin center.<\/p>\n

Start time: Friday, October 24, 2025, at 11:32 AM UTC<\/p>\n

End time: Wednesday, April 8, 2026, at 4:33 AM UTC<\/p>\n

Root cause: A timing issue during a recent migration causes backend systems to act before directory changes were fully synchronized, resulting in impact.<\/p>\n

Next steps:
– We\u2019re considering deprecating the Upgrade-DistributionGroup cmdlet 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:\u7ba1\u7406\u8005\u306fPowerShell\u3084Exchange\u7ba1\u7406\u30bb\u30f3\u30bf\u30fc\u3092\u4f7f\u3063\u3066\u3001\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u30ea\u30b9\u30c8\u304b\u3089\u7d71\u4e00\u30b0\u30eb\u30fc\u30d7\u3078\u306e\u30b0\u30eb\u30fc\u30d7\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u304c\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f<\/p>\n

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\u6700\u7d42\u72b6\u6cc1:\u4fee\u6b63\u306f\u5f71\u97ff\u3092\u53d7\u3051\u308b\u3059\u3079\u3066\u306e\u74b0\u5883\u3067\u5b8c\u5168\u306b\u5c55\u958b\u3055\u308c\u305f\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002\u7ba1\u7406\u8005\u306fPowerShell\u306eNew-UnifiedGroup\u30b3\u30de\u30f3\u30c9\u30ec\u30c3\u30c8\u3092\u4f7f\u3063\u3066\u3001\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u30ea\u30b9\u30c8\u3092\u7d71\u4e00\u30b0\u30eb\u30fc\u30d7\u306b\u5909\u63db\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002Upgrade-DistributionGroup \u30b3\u30de\u30f3\u30c9\u30ec\u30c3\u30c8\u3092\u76f4\u63a5\u5b9f\u884c\u3059\u308b\u7ba1\u7406\u8005\u306f\u3001\u5f15\u304d\u7d9a\u304d\u969c\u5bb3\u306b\u906d\u9047\u3057\u307e\u3059\u3002\u3053\u306e\u30b3\u30de\u30f3\u30c9\u30ec\u30c3\u30c8\u306f\u5c06\u6765\u7684\u306b\u975e\u63a8\u5968\u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u5f71\u97ff\u7bc4\u56f2:\u5f71\u97ff\u306f\u3001PowerShell\u3084Exchange\u7ba1\u7406\u30bb\u30f3\u30bf\u30fc\u3092\u4f7f\u3063\u3066\u30b0\u30eb\u30fc\u30d7\u3092\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u30ea\u30b9\u30c8\u304b\u3089\u7d71\u4e00\u30b0\u30eb\u30fc\u30d7\u306b\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u3057\u3088\u3046\u3068\u3059\u308b\u4e00\u90e8\u306e\u7ba1\u7406\u8005\u306b\u7279\u5316\u3057\u307e\u3057\u305f\u3002<\/p>\n

\u958b\u59cb\u6642\u9593:2025\u5e7410\u670824\u65e5\u91d1\u66dc\u65e5 \u5348\u524d11\u664232\u5206 UTC<\/p>\n

\u7d42\u4e86\u6642\u523b:2026\u5e744\u67088\u65e5\u6c34\u66dc\u65e5 \u5348\u524d4\u664233\u5206 UTC<\/p>\n

\u6839\u672c\u539f\u56e0:\u6700\u8fd1\u306e\u79fb\u884c\u6642\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u306e\u554f\u984c\u306b\u3088\u308a\u3001\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u30b7\u30b9\u30c6\u30e0\u304c\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u5909\u66f4\u304c\u5b8c\u5168\u306b\u540c\u671f\u3055\u308c\u308b\u524d\u306b\u52d5\u4f5c\u3057\u3001\u5f71\u97ff\u304c\u751f\u3058\u307e\u3059\u3002<\/p>\n

\u6b21\u306e\u30b9\u30c6\u30c3\u30d7:
– \u5c06\u6765\u7684\u306bUpgrade-DistributionGroup\u306e\u30b3\u30de\u30f3\u30c9\u30ec\u30c3\u30c8\u3092\u5ec3\u6b62\u3059\u308b\u3053\u3068\u3092\u691c\u8a0e\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":"

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