{"id":12481,"date":"2025-08-07T03:00:56","date_gmt":"2025-08-06T18:00:56","guid":{"rendered":"https:\/\/m365jp.net\/?p=12481"},"modified":"2025-08-07T03:08:48","modified_gmt":"2025-08-06T18:08:48","slug":"servicedegradation-ex1109507-exchange-online-some-attendees-may-receive-an-unexpected-cancellation-message-when-an-exchange-online-shared-calendar-event-is-updated-12","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2025-08-07-servicedegradation-ex1109507-exchange-online-some-attendees-may-receive-an-unexpected-cancellation-message-when-an-exchange-online-shared-calendar-event-is-updated-12","title":{"rendered":"[serviceDegradation] EX1109507 | Exchange Online | Some attendees may receive an unexpected cancellation message when an Exchange Online shared calendar event is updated"},"content":{"rendered":"
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EX1109507 | Exchange Online | Some attendees may receive an unexpected cancellation message when an Exchange Online shared calendar event is updated<\/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>\nAttendees may receive an unexpected cancellation message when an Exchange Online shared calendar event is updated.<\/td>\n<\/tr>\n
Last Updated<\/th>\n08\/06\/2025 17:07:42<\/td>\n<\/tr>\n
Start Time<\/th>\n07\/05\/2025 02:00:29<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Some attendees may receive an unexpected cancellation message when an Exchange Online shared calendar event is updated<\/p>\n

User impact: Attendees may receive an unexpected cancellation message when an Exchange Online shared calendar event is updated.<\/p>\n

More info: Impact is intermittent and specific to calendar event updates that are made on behalf of the organizer using classic Outlook desktop client with the calendar sharing improvements enabled.<\/p>\n

Current status: The fix to address the issue for any new meeting is now at 99 percent saturation in the affected environment, and we’re continuing to monitor closely as the deployment completes. In parallel, our fix to address already corrupted events is undergoing the final states of testing, and we now anticipate this fix will reach affected users by the end of August 2025.<\/p>\n

Scope of impact: Some attendees with enabled calendar sharing improvements may be intermittently receiving cancellation messages for updated shared calendar events when the event is still active.<\/p>\n

Start time: Thursday, June 5, 2025, at 12:00 AM UTC<\/p>\n

Root cause: Impact occurs due to a code issue triggered when meeting organizers are added as a required meeting attendee.<\/p>\n

Next update by: Wednesday, August 13, 2025, at 6:00 PM UTC<\/td>\n<\/tr>\n

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\u958b\u59cb\u6642\u9593: 2025 \u5e74 6 \u6708 5 \u65e5\u6728\u66dc\u65e5\u5348\u524d 12:00 UTC<\/p>\n

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\u6b21\u56de\u66f4\u65b0\u65e5: 2025 \u5e74 8 \u6708 13 \u65e5\u6c34\u66dc\u65e5\u3001\u5348\u5f8c 6:00 UTC<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

EX1109507 | Exchange Online | Some attendees may receive an unexpected cancellation message when an Exchange O […]<\/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-12481","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/12481","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=12481"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/12481\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=12481"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=12481"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=12481"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}