{"id":16808,"date":"2026-06-12T04:01:09","date_gmt":"2026-06-11T19:01:09","guid":{"rendered":"https:\/\/m365jp.net\/?p=16808"},"modified":"2026-06-12T04:03:24","modified_gmt":"2026-06-11T19:03:24","slug":"servicedegradation-cw1386443-microsoft-365-copilot-chat-some-users-may-experience-degradation-with-microsoft-365-copilot-chat-responses-after-uploading-a-file-6","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-06-12-servicedegradation-cw1386443-microsoft-365-copilot-chat-some-users-may-experience-degradation-with-microsoft-365-copilot-chat-responses-after-uploading-a-file-6","title":{"rendered":"[serviceDegradation] CW1386443 | Microsoft 365 Copilot Chat | Some users may experience degradation with Microsoft 365 Copilot Chat responses after uploading a file"},"content":{"rendered":"
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CW1386443 | Microsoft 365 Copilot Chat | Some users may experience degradation with Microsoft 365 Copilot Chat responses after uploading a file<\/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>\nUsers may experience degradation with Copilot Chat responses after uploading a file.<\/td>\n<\/tr>\n
Last Updated<\/th>\n06\/11\/2026 18:11:10<\/td>\n<\/tr>\n
Start Time<\/th>\n06\/09\/2026 06:00:00<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Some users may experience degradation with Microsoft 365 Copilot Chat responses after uploading a file <\/p>\n

User impact: Users may experience degradation with Copilot Chat responses after uploading a file. <\/p>\n

More info: Affected users may be returned an error message stating, “Oops! Something happened. Can you try again?”<\/p>\n

Users report low-quality or inaccurate responses when Copilot Chat is prompted to respond on content within uploaded files.<\/p>\n

Additionally, users attempting to send a message with file grounding may receive the following response, “I tried to open your file {file name}, but I\u2019m currently unable to retrieve its contents due to an access\/activity limit on the file.” <\/p>\n

Current status: We’ve identified another facet of the impacted user experience in that users sending messages with file grounding may receive a response noting Copilot Chat can’t retrieve contents due to an access or activity limit, and we’ve updated the More info section of this communication with this information. Our previously communicated status remains accurate, as we monitor file upload traffic across affected regions to confirm our changes are remediating the impact and scale out our configuration change to prevent retries from adding more load during OneDrive or SharePoint Online file uploads. <\/p>\n

Scope of impact: Some users may experience degradation with Copilot Chat responses after uploading a file. This section may be updated as the investigation progresses. <\/p>\n

Start time: Tuesday, June 09, 2026, at 6:00 AM UTC <\/p>\n

Root cause: Normal growth in Microsoft 365 Copilot usage exceeded the available resources needed to process OneDrive and SharePoint Online file upload requests, causing some requests to process slower or fail. <\/p>\n

Next update by: Thursday, June 11, 2026, at 11:00 PM UTC<\/td>\n<\/tr>\n

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\u958b\u59cb\u6642\u9593:2026\u5e746\u67089\u65e5\u706b\u66dc\u65e5 \u5348\u524d6\u6642 UTC <\/p>\n

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