{"id":18703,"date":"2026-09-25T02:01:20","date_gmt":"2026-09-24T17:01:20","guid":{"rendered":"https:\/\/m365jp.net\/?p=18703"},"modified":"2026-09-25T02:04:46","modified_gmt":"2026-09-24T17:04:46","slug":"servicedegradation-ex1478163-exchange-online-users-may-be-unable-to-update-calendar-delegates-in-the-classic-outlook-desktop-client-2","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-09-25-servicedegradation-ex1478163-exchange-online-users-may-be-unable-to-update-calendar-delegates-in-the-classic-outlook-desktop-client-2","title":{"rendered":"[serviceDegradation] EX1478163 | Exchange Online | Users may be unable to update calendar delegates in the classic Outlook desktop client"},"content":{"rendered":"
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EX1478163 | Exchange Online | Users may be unable to update calendar delegates in the classic Outlook desktop client <\/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 update calendar delegates in the classic Outlook desktop client.<\/td>\n<\/tr>\n
Last Updated<\/th>\n09\/24\/2026 16:27:39<\/td>\n<\/tr>\n
Start Time<\/th>\n09\/24\/2026 05:45:38<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Users may be unable to update calendar delegates in the classic Outlook desktop client <\/p>\n

User impact: Users may be unable to update calendar delegates in the classic Outlook desktop client. <\/p>\n

More info: As a workaround, affected users can manage delegate changes through Outlook on the web. <\/p>\n

Current status: We’re continuing our plan to revert the change while also looking for methods of expediting the process. Once complete, we’ll validate using service telemetry to confirm recovery for all affected users. <\/p>\n

Scope of impact: Impact is specific to users that are unable to update calendar delegates in the classic Outlook desktop client. <\/p>\n

Next update by: Friday, September 25, 2026, at 8:00 PM UTC<\/td>\n<\/tr>\n

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