{"id":14418,"date":"2026-01-06T16:00:59","date_gmt":"2026-01-06T07:00:59","guid":{"rendered":"https:\/\/m365jp.net\/?p=14418"},"modified":"2026-01-06T16:01:48","modified_gmt":"2026-01-06T07:01:48","slug":"servicerestored-ex1213757-exchange-online-users-may-see-an-english-user-interface-for-outlook-on-the-web-on-mobile-when-configured-for-a-non-english-language","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-01-06-servicerestored-ex1213757-exchange-online-users-may-see-an-english-user-interface-for-outlook-on-the-web-on-mobile-when-configured-for-a-non-english-language","title":{"rendered":"[serviceRestored] EX1213757 | Exchange Online | Users may see an English user interface for Outlook on the web on mobile when configured for a non-English language"},"content":{"rendered":"
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EX1213757 | Exchange Online | Users may see an English user interface for Outlook on the web on mobile when configured for a non-English language<\/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 seen an English user interface for Outlook on the web on mobile when configured for non-English language.<\/td>\n<\/tr>\n
Last Updated<\/th>\n01\/06\/2026 06:02:40<\/td>\n<\/tr>\n
Start Time<\/th>\n12\/23\/2025 00:00:00<\/td>\n<\/tr>\n
End Time<\/th>\n01\/06\/2026 05:32:00<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Users may see an English user interface for Outlook on the web on mobile when configured for a non-English language<\/p>\n

User impact: Users may have seen an English user interface for Outlook on the web on mobile when configured for non-English language.<\/p>\n

More info: Impacted users would see an English user interface for Outlook on the web when accessing the service through mobile devices on both Android and iOS, even when the user interface configuration was set to alternate languages.<\/p>\n

Final status: We’ve identified that a recent service update contained misconfigured localization data, resulting in impact. We’ve rolled back the problematic changes throughout the affected environment and confirmed through internal testing that impact is remediated.<\/p>\n

Scope of impact: Users accessing Outlook on the web through mobile devices with their user interface language set to non-English languages may have been impacted.<\/p>\n

Start time: Tuesday, December 23, 2025, at 12:00 AM UTC<\/p>\n

End time: Tuesday, January 6, 2026, at 5:32 AM UTC<\/p>\n

Root cause: A recent service update contained misconfigured localization data, resulting in impact.<\/p>\n

Next steps:
– We’re reviewing our update testing and validation methods to better identify issues such as this prior to deployment so we can prevent similar impact in the future.<\/p>\n

This is the final update for the event.<\/td>\n<\/tr>\n

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\u958b\u59cb\u6642\u9593:2025\u5e7412\u670823\u65e5\u706b\u66dc\u65e5 0:00 UTC<\/p>\n

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\u6b21\u306e\u30b9\u30c6\u30c3\u30d7:
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