{"id":16336,"date":"2026-05-08T09:01:18","date_gmt":"2026-05-08T00:01:18","guid":{"rendered":"https:\/\/m365jp.net\/?p=16336"},"modified":"2026-05-08T09:01:34","modified_gmt":"2026-05-08T00:01:34","slug":"servicerestored-ex1254044-exchange-online-some-users-may-have-been-unable-to-use-classic-outlook-when-the-teams-meeting-add-in-was-enabled-4","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-05-08-servicerestored-ex1254044-exchange-online-some-users-may-have-been-unable-to-use-classic-outlook-when-the-teams-meeting-add-in-was-enabled-4","title":{"rendered":"[serviceRestored] EX1254044 | Exchange Online | Some users may have been unable to use classic Outlook when the Teams Meeting Add-in was enabled"},"content":{"rendered":"
\n
\n
\n\n\n\n
EX1254044 | Exchange Online | Some users may have been unable to use classic Outlook when the Teams Meeting Add-in was enabled<\/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 been unable to use classic Outlook when the Teams Meeting Add-in was enabled.<\/td>\n<\/tr>\n
Last Updated<\/th>\n05\/07\/2026 23:37:02<\/td>\n<\/tr>\n
Start Time<\/th>\n02\/25\/2026 01:10:00<\/td>\n<\/tr>\n
End Time<\/th>\n05\/06\/2026 07:03:00<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Some users may have been unable to use classic Outlook when the Teams Meeting Add-in was enabled<\/p>\n

User impact: Users may have been unable to use classic Outlook when the Teams Meeting Add-in was enabled.<\/p>\n

More info: Specifically, impacted users may have experienced crashes while using the classic Outlook on any client, or been unable to launch the service.<\/p>\n

We’ve confirmed that the previous Microsoft Teams version 26032.208.4399.5 worked successfully with classic Outlook. Users who updated to the latest version of Teams and were still experiencing issues could’ve restarted the Teams app and signed out and back in again to ensure the updated configuration was applied. If the issue persisted, we recommended reaching out to your support representatives to request a temporary reversion if were affected by this event.<\/p>\n

Final status: We’ve confirmed that the fix has been successfully deployed and impact remediated.<\/p>\n

Scope of impact: Some users attempting to use classic Outlook with the Microsoft Teams Meeting Add-in enabled in Teams version 26043.2016.4478.2773 may have been impacted.<\/p>\n

Start time: Wednesday, February 25, 2026, at 1:10 AM UTC<\/p>\n

End time: Wednesday, May 06, 2026, at 7:03 AM UTC<\/p>\n

Root cause: A code issue within a recent Microsoft Teams Meeting Add-in update under Microsoft Teams version 26043.2016.4478.2773 was causing a compatibility issue with classic Outlook and resulting in functionality issues.<\/p>\n

Next steps: We’re reviewing our update procedures to better identify similar issues during our development and testing cycles.<\/p>\n

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

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb:\u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u3001Teams\u4f1a\u8b70\u30a2\u30c9\u30a4\u30f3\u304c\u6709\u52b9\u306b\u306a\u3063\u3066\u3044\u308b\u3068\u304d\u306b\u30af\u30e9\u30b7\u30c3\u30afOutlook\u3092\u4f7f\u3048\u306a\u304b\u3063\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff:Teams\u306e\u4f1a\u8b70\u30a2\u30c9\u30a4\u30f3\u304c\u6709\u52b9\u306b\u306a\u3063\u3066\u3044\u308b\u9593\u3001\u30e6\u30fc\u30b6\u30fc\u306f\u30af\u30e9\u30b7\u30c3\u30afOutlook\u3092\u4f7f\u3048\u306a\u304b\u3063\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u8a73\u7d30\u60c5\u5831:\u5177\u4f53\u7684\u306b\u306f\u3001\u5f71\u97ff\u3092\u53d7\u3051\u305f\u30e6\u30fc\u30b6\u30fc\u306f\u3001\u3069\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3067\u3082\u30af\u30e9\u30b7\u30c3\u30afOutlook\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u969b\u306b\u30af\u30e9\u30c3\u30b7\u30e5\u3092\u7d4c\u9a13\u3057\u305f\u308a\u3001\u30b5\u30fc\u30d3\u30b9\u3092\u8d77\u52d5\u3067\u304d\u306a\u304b\u3063\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u4ee5\u524d\u306eMicrosoft Teams\u30d0\u30fc\u30b8\u30e7\u30f326032.208.4399.5\u304c\u30af\u30e9\u30b7\u30c3\u30afOutlook\u3067\u6b63\u5e38\u306b\u52d5\u4f5c\u3057\u305f\u3053\u3068\u306f\u78ba\u8a8d\u6e08\u307f\u3067\u3059\u3002\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u306eTeams\u306b\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3057\u3066\u3082\u554f\u984c\u304c\u7d9a\u3044\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u306f\u3001Teams\u30a2\u30d7\u30ea\u3092\u518d\u8d77\u52d5\u3057\u3066\u30ed\u30b0\u30a2\u30a6\u30c8\u3057\u3066\u518d\u5ea6\u30b5\u30a4\u30f3\u30a4\u30f3\u3057\u3001\u6700\u65b0\u306e\u8a2d\u5b9a\u304c\u9069\u7528\u3055\u308c\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002\u554f\u984c\u304c\u7d9a\u304f\u5834\u5408\u306f\u3001\u3053\u306e\u30a4\u30d9\u30f3\u30c8\u306e\u5f71\u97ff\u3092\u53d7\u3051\u305f\u5834\u5408\u306f\u30b5\u30dd\u30fc\u30c8\u62c5\u5f53\u8005\u306b\u9023\u7d61\u3057\u3001\u4e00\u6642\u7684\u306a\u30ea\u30d0\u30fc\u30c8\u3092\u4f9d\u983c\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n

\u6700\u7d42\u72b6\u6cc1:\u4fee\u6b63\u304c\u7121\u4e8b\u306b\u5b9f\u65bd\u3055\u308c\u3001\u5f71\u97ff\u304c\u56de\u5fa9\u3055\u308c\u305f\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002<\/p>\n

\u5f71\u97ff\u7bc4\u56f2:Teams \u30d0\u30fc\u30b8\u30e7\u30f326043.2016.4478.2773\u3067Microsoft Teams Meeting\u30a2\u30c9\u30a4\u30f3\u3092\u6709\u52b9\u306b\u3057\u305f\u72b6\u614b\u3067\u30af\u30e9\u30b7\u30c3\u30afOutlook\u3092\u4f7f\u304a\u3046\u3068\u3059\u308b\u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u5f71\u97ff\u3092\u53d7\u3051\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u958b\u59cb\u6642\u9593:2026\u5e742\u670825\u65e5\u6c34\u66dc\u65e5 \u5348\u524d1\u664210\u5206 UTC<\/p>\n

\u7d42\u4e86\u6642\u523b:2026\u5e745\u67086\u65e5\u6c34\u66dc\u65e5 \u5348\u524d7\u664203\u5206 UTC<\/p>\n

\u6839\u672c\u539f\u56e0:\u6700\u8fd1\u306eMicrosoft Teams Meeting\u30a2\u30c9\u30a4\u30f3\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8(\u30d0\u30fc\u30b8\u30e7\u30f326043.2016.4478.2773)Microsoft Teams\u30b3\u30fc\u30c9\u306e\u554f\u984c\u304c\u3001\u30af\u30e9\u30b7\u30c3\u30afOutlook\u3068\u306e\u4e92\u63db\u6027\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3057\u3001\u6a5f\u80fd\u306e\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3057\u307e\u3057\u305f\u3002<\/p>\n

\u6b21\u306e\u30b9\u30c6\u30c3\u30d7:\u958b\u767a\u304a\u3088\u3073\u30c6\u30b9\u30c8\u30b5\u30a4\u30af\u30eb\u3067\u540c\u69d8\u306e\u554f\u984c\u3092\u3088\u308a\u6b63\u78ba\u306b\u7279\u5b9a\u3059\u308b\u305f\u3081\u3001\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u624b\u9806\u3092\u898b\u76f4\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u3053\u308c\u304c\u30a4\u30d9\u30f3\u30c8\u306e\u6700\u7d42\u66f4\u65b0\u3067\u3059\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

EX1254044 | Exchange Online | Some users may have been unable to use classic Outlook when the Teams Meeting Ad […]<\/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-16336","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16336","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=16336"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16336\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=16336"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=16336"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=16336"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}