{"id":16320,"date":"2026-05-07T20:01:01","date_gmt":"2026-05-07T11:01:01","guid":{"rendered":"https:\/\/m365jp.net\/?p=16320"},"modified":"2026-05-07T20:01:45","modified_gmt":"2026-05-07T11:01:45","slug":"servicerestored-ex1254044-exchange-online-some-users-may-have-been-unable-to-use-classic-outlook-when-the-teams-meeting-add-in-was-enabled","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-05-07-servicerestored-ex1254044-exchange-online-some-users-may-have-been-unable-to-use-classic-outlook-when-the-teams-meeting-add-in-was-enabled","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":"
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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 10:53:58<\/td>\n<\/tr>\n
Start Time<\/th>\n03\/12\/2026 12:36:00<\/td>\n<\/tr>\n
End Time<\/th>\n05\/07\/2026 10:39:26<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Some users may have been unable to use classic Outlook when the Teams Meeting Add-in is enabled <\/p>\n

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

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

We’ve confirmed that the previous Microsoft Teams version 26032.208.4399.5 works successfully with classic Outlook. Users who\u2019ve updated to the latest version of Teams and are still experiencing issues should restart the Teams app and sign out and back in again to ensure the updated configuration is applied. If the issue persists, we recommend reaching out to your support representatives to request a temporary reversion if you’re affected by this event. <\/p>\n

Final status: We’ve confirmed that the fix has been successfully deployed and issue has been mitigated. <\/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: Thursday, March 12, 2026, at 12:36 PM 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\u306fTeams\u306e\u4f1a\u8b70\u30a2\u30c9\u30a4\u30f3\u3092\u6709\u52b9\u306b\u3057\u3066\u3044\u308b\u3068\u3001\u30af\u30e9\u30b7\u30c3\u30afOutlook\u3092\u4f7f\u3048\u306a\u304b\u3063\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059 <\/p>\n

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\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\u5e743\u670812\u65e5\u6728\u66dc\u65e5 12:36 PM 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

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\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-16320","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16320","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=16320"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/16320\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=16320"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=16320"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=16320"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}