{"id":17442,"date":"2026-07-23T16:03:37","date_gmt":"2026-07-23T07:03:37","guid":{"rendered":"https:\/\/m365jp.net\/?p=17442"},"modified":"2026-07-23T16:05:17","modified_gmt":"2026-07-23T07:05:17","slug":"servicerestored-cw1436954-microsoft-365-copilot-chat-some-users-may-see-an-error-when-sending-messages-from-bizchat-and-the-bizchat-side-pane-in-microsoft-365-apps","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-07-23-servicerestored-cw1436954-microsoft-365-copilot-chat-some-users-may-see-an-error-when-sending-messages-from-bizchat-and-the-bizchat-side-pane-in-microsoft-365-apps","title":{"rendered":"[serviceRestored] CW1436954 | Microsoft 365 Copilot Chat | Some users may see an error when sending messages from BizChat and the BizChat side pane in Microsoft 365 apps."},"content":{"rendered":"<div class=\"postie-post\">\n<div>\n<hr>\n<table id=\"section\">\n<tbody>\n<tr>\n<th width=\"95%\">CW1436954 | Microsoft 365 Copilot Chat | Some users may see an error when sending messages from BizChat and the BizChat side pane in Microsoft 365 apps.<\/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\">serviceRestored<\/td>\n<\/tr>\n<tr>\n<th>Classification<\/th>\n<td>advisory<\/td>\n<\/tr>\n<tr>\n<th>User Impact<\/th>\n<td>Some users may have seen an error when sending messages from BizChat and the BizChat side pane in Microsoft 365 apps.<\/td>\n<\/tr>\n<tr>\n<th>Last Updated<\/th>\n<td>07\/23\/2026 06:13:35<\/td>\n<\/tr>\n<tr>\n<th>Start Time<\/th>\n<td>07\/23\/2026 03:19:34<\/td>\n<\/tr>\n<tr>\n<th>End Time<\/th>\n<td>07\/23\/2026 06:11:58<\/td>\n<\/tr>\n<tr>\n<th>Latest Message<\/th>\n<td>Title: Some users may see an error when sending messages from BizChat and the BizChat side pane in Microsoft 365 apps.  <\/p>\n<p>  User impact: Some users may have seen an error when sending messages from BizChat and the BizChat side pane in Microsoft 365 apps.  <\/p>\n<p>  More info: More info: Affected Microsoft 365 apps included:<br \/>  Outlook on the web <br \/>  Outlook desktop<br \/>  Microsoft Teams<br \/>  Affected users may have seen an error stating \u201csomething went wrong.\u201d<\/p>\n<p>  This issue affected users that had selected the Opus 4.8 model. <\/p>\n<p>  Final status: We\u2019ve determined that a recent update intended to enable an updated AI model used to process chat requests and generate responses, Opus 4.8, caused an unexpected influx of service requests that led to the impact. We\u2019ve reverted the offending update   and confirmed from service telemetry that this issue is resolved. <\/p>\n<p>  Scope of impact: Some users located in the Asia Pacific or South America regions sending messages from BizChat and the BizChat side pane from an affected M365 app may have been impacted.  <\/p>\n<p>  Start time: Thursday, July 23, 2026, at 1:23 AM UTC <\/p>\n<p>  End time: Thursday, July 23, 2026, at 4:38 AM UTC <\/p>\n<p>  Root cause: A recent update intended to enable an updated AI model used to process chat requests and generate responses, Opus 4.8, caused an unexpected influx of service requests that led to the impact.  <\/p>\n<p>  Next steps: We\u2019re reviewing our validation and updating procedures to better detect and prevent issues like this prior to deployment in the future.  <\/p>\n<p>  This is the final update for the event.<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>CW1436954 | Microsoft 365 Copilot Chat | Some users may see an error when sending messages from BizChat and th [&hellip;]<\/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-17442","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/17442","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=17442"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/17442\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=17442"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=17442"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=17442"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}