{"id":12296,"date":"2025-07-22T13:01:29","date_gmt":"2025-07-22T04:01:29","guid":{"rendered":"https:\/\/m365jp.net\/?p=12296"},"modified":"2025-07-22T13:04:45","modified_gmt":"2025-07-22T04:04:45","slug":"servicedegradation-ex1109507-exchange-online-some-attendees-may-receive-an-unexpected-cancellation-message-when-an-exchange-online-shared-calendar-event-is-updated-6","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2025-07-22-servicedegradation-ex1109507-exchange-online-some-attendees-may-receive-an-unexpected-cancellation-message-when-an-exchange-online-shared-calendar-event-is-updated-6","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":"<div class=\"postie-post\">\n<div>\n<hr>\n<table id=\"section\">\n<tbody>\n<tr>\n<th width=\"95%\">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<hr>\n<table id=\"data\">\n<tbody>\n<tr>\n<th>Status<\/th>\n<td class=\"bad\">serviceDegradation<\/td>\n<\/tr>\n<tr>\n<th>Classification<\/th>\n<td>advisory<\/td>\n<\/tr>\n<tr>\n<th>User Impact<\/th>\n<td>Attendees may receive an unexpected cancellation message when an Exchange Online shared calendar event is updated.<\/td>\n<\/tr>\n<tr>\n<th>Last Updated<\/th>\n<td>07\/22\/2025 03:12:47<\/td>\n<\/tr>\n<tr>\n<th>Start Time<\/th>\n<td>07\/05\/2025 02:00:29<\/td>\n<\/tr>\n<tr>\n<th>End Time<\/th>\n<td><\/td>\n<\/tr>\n<tr>\n<th>Latest Message<\/th>\n<td>Title: Some attendees may receive an unexpected cancellation message when an Exchange Online shared calendar event is updated<\/p>\n<p>  User impact: Attendees may receive an unexpected cancellation message when an Exchange Online shared calendar event is updated.<\/p>\n<p>  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<p>  Current status: We&#8217;re performing our final internal validations for the fix to address the code issue before deploying it throughout the affected infrastructure. We anticipate that the validation process will be completed by our next scheduled update, at which   point we&#8217;re aiming to provide a remediation timeline if possible.<\/p>\n<p>  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<p>  Start time: Thursday, June 5, 2025, at 12:00 AM UTC<\/p>\n<p>  Root cause: Impact occurs due to a code issue triggered when meeting organizers are added as a required meeting attendee.<\/p>\n<p>  Next update by: Tuesday, July 22, 2025, at 5:00 PM UTC<\/td>\n<\/tr>\n<tr>\n<th>Machine Translation<\/th>\n<td>\u30bf\u30a4\u30c8\u30eb: Exchange Online \u5171\u6709\u4e88\u5b9a\u8868\u30a4\u30d9\u30f3\u30c8\u304c\u66f4\u65b0\u3055\u308c\u308b\u3068\u3001\u4e00\u90e8\u306e\u51fa\u5e2d\u8005\u304c\u4e88\u671f\u3057\u306a\u3044\u30ad\u30e3\u30f3\u30bb\u30eb 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\u5f71\u97ff\u306f\u3001\u4f1a\u8b70\u306e\u958b\u50ac\u8005\u304c\u5fc5\u9808\u306e\u4f1a\u8b70\u51fa\u5e2d\u8005\u3068\u3057\u3066\u8ffd\u52a0\u3055\u308c\u305f\u3068\u304d\u306b\u30c8\u30ea\u30ac\u30fc\u3055\u308c\u308b\u30b3\u30fc\u30c9\u306e\u554f\u984c\u304c\u539f\u56e0\u3067\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<p>  \u6b21\u306e\u66f4\u65b0\u8005: 2025\u5e747\u670822\u65e5(\u706b)17:00 UTC<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>EX1109507 | Exchange Online | Some attendees may receive an unexpected cancellation message when an Exchange O 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