Microsoft 365 のサービス正常性（TM495255）にて、Microsoft Teams デスクトップ クライアントおよび Microsoft Teams ブラウザー版から、一部のグループ チャットでファイルや写真のアップロードが行えないことがあるアドバイザリが発生しています。

“TM495255” のサマリー

目次

Users may be unable to upload files or photos in some group chats from the Microsoft Teams desktop and web clients – TM495255

サービス：Microsoft Teams

状態：Service degradation

ユーザーへの影響：Users may be unable to upload files or photos in some group chats from the Microsoft Teams desktop and web clients.

Microsoft 365 のサービス正常性（TM495255）にて、Microsoft Teams デスクトップ クライアントおよび Microsoft Teams ブラウザー版から、一部のグループ チャットでファイルや写真のアップロードが行えないことがあるアドバイザリが発生しています。

本事象の影響を受けているユーザーでは、Microsoft Teams デスクトップ クライアントおよび Microsoft Teams ブラウザー版から、一部のグループ チャットにファイルや写真のアップロードが行えないことがあります。

この問題は、異なる組織ポリシーが適用された 25 人以上のグループ チャットにファイルや写真のアップロードを行う場合に影響を受ける可能性があります。

なお、影響が受けたユーザーは、”送信時に失敗しました” というエラー メッセージが表示されることがあります。

また、ユーザーはファイルまたは写真を “OneDrive for Busienss” 内に直接アップロードし、グループ チャットのユーザーに対してリンクを共有することで回避できる場合があります。

現在、修正プログラムの展開を行いましたが、モニタリングの結果、本事象の影響を完全に取り除くことができない可能性があることを確認しています。

そのため、グループ チャット内のユーザーのファイル識別子が検索し、リンクが生成される動作を最適化する追加の修正プログラムを開発中となります。

本事象は、最近の標準サービス コードの移行に伴って、ユーザーのファイル識別子を検索し、リンクを生成する機能にリグレッションが発生していることで、異なる組織ポリシーが適用された 25 人以上のグループ チャットにファイルや写真のアップロードに失敗する問題になります。

この問題は、異なる組織ポリシーが適用されているユーザーが存在する 25 人以上のグループ チャット内でファイルや写真をアップロードするユーザーに影響している可能性があります。

February 14, 2023 12:19 AM

• ・Title : Users may be unable to upload files or photos in some group chats from the Microsoft Teams desktop and web clients
• ・User impact : Users may be unable to upload files or photos in some group chats from the Microsoft Teams desktop and web clients.
• ・More info : Users may only encounter impact when uploading files or photos to group chats larger than 25 users with different organization policies applied e.g.
• External users. Affected users may receive an error which states, “Failed when sending.”
• As a workaround, users may be able to upload the file or photo to OneDrive for Business and share the file link to users of the group chat.
• ・Current status : We’ve deployed the initial fix but monitoring indicates that the fix may not remediate impact completely.
• We’re developing an additional fix that will optimize and update the behaviour that group chat users’ file identifiers are searched and access links are generated.
• We anticipate the fix will be fully developed and ready for deployment by our next scheduled update.
• ・Scope of impact : Impact is specific to any user attempting to upload files or photos to group chats larger than 25 users with different organization policies applied.
• ・Root cause : A recent standard service code migration inadvertently contains a regression, in the functionality that users’ file identifiers are searched and access links are generated, resulting in files or photos uploaded to group chats larger than 25 users with different organization policies to fail.
• ・Next update by : Wednesday, February 22, 2023, 1:00 AM (2/21/2023, 4:00 PM UTC)

February 7, 2023 2:27 AM

• ・Title : Some users can’t upload files or photos in group chats from the Microsoft Teams desktop and web clients
• ・User impact : Users can’t upload files or photos in group chats from the Microsoft Teams desktop and web clients.
• ・More info : Impacted users receive an error which states, “Failed when sending.”
• ・Current status : We’ve internally validated that this feature flag has been properly enabled for some affected users and should remediate the issue without causing further impact.
• We’re continuing to deploy the fix for the remaining impacted users and expect that it will complete by Thursday, February 16, 2023.
• ・Scope of impact : Your organization is affected by this event, and some users can’t upload files or photos in Microsoft Teams group chats from the Microsoft Teams desktop and web clients.
• ・Estimated time to resolve : We expect that the issue will be fully resolved by Thursday, February 16, 2023.
• ・Next update by : Tuesday, February 14, 2023, 1:00 AM (2/13/2023, 4:00 PM UTC)

February 4, 2023 12:59 AM

• ・Title : Some users can’t upload files or photos in group chats from the Microsoft Teams desktop and web clients
• ・User impact : Users can’t upload files or photos in group chats from the Microsoft Teams desktop and web clients.
• ・More info : Impacted users receive an error which states, “Failed when sending.”
• ・Current status : We’re enabling the feature flag across the affected infrastructure gradually to ensure it’s success.
• Once we’ve confirmed it’s success, we’ll perform a full rollout across the entire infrastructure.
• ・Scope of impact : Your organization is affected by this event, and some users can’t upload files or photos in Microsoft Teams group chats from the Microsoft Teams desktop and web clients.
• ・Next update by : Tuesday, February 7, 2023, 1:00 AM (2/6/2023, 4:00 PM UTC)

January 24, 2023 12:25 AM

• ・Title : Some users can’t upload files or photos in group chats from the Microsoft Teams desktop and web clients
• ・User Impact : Users can’t upload files or photos in group chats from the Microsoft Teams desktop and web clients.
• ・More info : Impacted users receive an error which states, “Failed when sending.”
• ・Current status : We’re continuing the process of enabling the feature flag across the affected infrastructure to resolve the issue.
• In parallel, we’re continuing to optimize timeout parameters to reduce or avoid additional file and photo upload failures while we work towards full remediation.
• We expect to be able to provide a completion time as part of the next scheduled update.
• ・Scope of impact : Your organization is affected by this event, and some users can’t upload files or photos in Microsoft Teams group chats from the Microsoft Teams desktop and web clients.
• ・Next update by : Saturday, February 4, 2023, 1:00 AM (2/3/2023, 4:00 PM UTC)

January 19, 2023 11:30 PM

• ・Title : Some users can’t upload files or photos in group chats from the Microsoft Teams desktop and web clients
• ・User Impact : Users can’t upload files or photos in group chats from the Microsoft Teams desktop and web clients.
• ・More info : Impacted users receive an error which states, “Failed when sending.”
• ・Current status : Following our review of network trace logs and additional diagnostic data, we’ve determined that a high number of user request timeouts is responsible for causing impact.
• To mitigate the issue, we’re increasing timeout thresholds to reduce or avoid additional request failures.
• In parallel, we’re enabling a feature flag in a section of infrastructure responsible for regulating file and photo uploads to Microsoft Teams group chats, which we expect to remediate impact once complete.
• ・Scope of impact : Your organization is affected by this event, and some users can’t upload files or photos in Microsoft Teams group chats from the Microsoft Teams desktop and web clients.
• ・Next update by : Tuesday, January 24, 2023, 1:00 AM (1/23/2023, 4:00 PM UTC)

January 19, 2023 2:38 AM

• ・Title : Some users can’t upload files or photos in group chats from the Microsoft Teams desktop and web clients
• ・User Impact : Users can’t upload files or photos in group chats from the Microsoft Teams desktop and web clients.
• ・More info : Impacted users receive an error which states, “Failed when sending.”
• ・Current status : While the issue may not be occurring for some users, we’ve confirmed with your representatives that impact persists for many.
• In light of this, we’re continuing our examination of network traces to isolate a possible networking issue, and we’re simultaneously reviewing additional details regarding some users’ permissions and firewall settings to inform our next investigative actions.
• ・Scope of impact : Your organization is affected by this event, and some users can’t upload files or photos in Microsoft Teams group chats from the Microsoft Teams desktop and web clients.
• ・Next update by : Friday, January 20, 2023, 1:00 AM (1/19/2023, 4:00 PM UTC)

January 12, 2023 1:58 AM

• ・Title : Some users can’t upload files or photos in group chats from the Microsoft Teams desktop and web clients
• ・User Impact : Users can’t upload files or photos in group chats from the Microsoft Teams desktop and web clients.
• ・More info : Impacted users receive an error which states, “Failed when sending.”
• ・Current status : During our network trace analysis, we’ve received reports from a subset of affected users that the problem stopped occurring.
• Our network trace analysis has focused our investigation on a potential networking issue between affected users and the Microsoft Teams service.
• We’re working with your organization to validate if impacted persists.
• In parallel, we’re confirming if users are connecting from home connections or corporate connections while also reviewing their permissions and firewall settings to aid in our investigation.
• ・Scope of impact : Your organization is affected by this event, and some users can’t upload files or photos in Microsoft Teams group chats from the Microsoft Teams desktop and web clients.
• ・Next update by : Thursday, January 19, 2023, 3:00 AM (1/18/2023, 6:00 PM UTC)

January 11, 2023 1:17 AM

• ・Title : Some users can’t upload files or photos in Microsoft Teams chats
• ・User Impact : Users can’t upload files or photos in Microsoft Teams chats.
• ・More info : This issue is specific to group chats. Both the Microsoft Teams desktop client and web application are affected.
• Users receive an error which states “Failed when sending.”
• ・Current status : We’re analyzing network trace and Teams diagnostic data that was collected from affected users to help us isolate the source for this event and to confirm our action plan for remediating the impact.
• ・Scope of impact : Your organization is affected by this event, and some users can’t upload files or photos in Microsoft Teams chats.
• ・Next update by : Thursday, January 12, 2023, 3:00 AM (1/11/2023, 6:00 PM UTC)

January 7, 2023 7:02 AM

• ・Title : Some users can’t upload files or photos in Microsoft Teams chats
• ・User Impact : Users can’t upload files or photos in Microsoft Teams chats.
• ・More info : This issue is specific to group chats. Both the Microsoft Teams desktop client and web application are affected.
• Users receive an error which states “Failed when sending.”
• ・Current status : We’ve determined that additional information is needed to assist our continued investigation.
• We’re reaching out to a subset of affected users to collect network trace logs to investigate if a potential networking issue may be occurring.
• In parallel, we’re also requesting details regarding permissions set by affected organization’s administrators, as well as firewall details to determine if that may be contributing to impact.
• Lastly, we’re also working to setup a live debugging session with a subset of users to reproduce the issue as attempts to reproduce internally have not been successful.
• ・Scope of impact : Your organization is affected by this event, and some users can’t upload files or photos in Microsoft Teams chats.
• ・Next update by : Tuesday, January 10, 2023, 3:00 AM (1/9/2023, 6:00 PM UTC)

January 7, 2023 5:14 AM

• ・Title : Some users can’t upload files or photos in Microsoft Teams chats
• ・User Impact : Users can’t upload files or photos in Microsoft Teams chats.
• ・More info : This issue is specific to group chats. Both the Microsoft Teams desktop client and web application are affected.
• Users receive an error which states “Failed when sending.”
• ・Current status : Our review of Fiddler trace logs from affected users has proven inconclusive thus far.
• We’re analyzing additional logging, including HTTP Archive format (HAR) logging information from an attempted file upload, as well as Problem Steps Recorder (PSR) logs for further insight into reproduction steps to assist our investigation into the source of impact.
• ・Scope of impact : Your organization is affected by this event, and some users can’t upload files or photos in Microsoft Teams chats.
• ・Next update by : Saturday, January 7, 2023, 7:30 AM (1/6/2023, 10:30 PM UTC)

January 7, 2023 3:55 AM

• ・Title : Some users can’t upload files or photos in Microsoft Teams chats
• ・User Impact : Users can’t upload files or photos in Microsoft Teams chats.
• ・More info: This issue is specific to group chats. Both the Microsoft Teams desktop client and web application are affected.
• Users receive an error which states “Failed when sending.”
• ・Current status : We’re reviewing Fiddler trace logs captured during a reproduction of impact to review and identify what failures are occurring when the Microsoft Teams service requests the files or photos from SharePoint Online to assist our remediation efforts.
• ・Scope of impact : Your organization is affected by this event, and some users can’t upload files or photos in Microsoft Teams chats.
• ・Next update by : Saturday, January 7, 2023, 5:30 AM (1/6/2023, 8:30 PM UTC)

January 7, 2023 3:33 AM

• ・Title : Some users can’t upload files or photos in Microsoft Teams chats
• ・User Impact : Users can’t upload files or photos in Microsoft Teams chats.
• ・More info : This issue is specific to group chats and 1:1 chats. Both the Microsoft Teams desktop client and web application are affected.
• Users receive an error which states “Failed when sending.”
• ・Current status : We’re investigating a potential issue and checking for impact to your organization.
• We’ll provide an update within 30 minutes.

Microsoft Teams とは？

Microsoft Teams は、Microsoft の提供するコラボレーション ツールになります。

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関連リンク

• ・OneDrive for Business｜安全なクラウド ストレージ｜クラウド バックアップ：https://www.microsoft.com/ja-jp/microsoft-365/onedrive/onedrive-for-business
• ・Microsoft Teams｜リモート ワークのためのコラボレーション ツール：https://www.microsoft.com/ja-jp/microsoft-365/microsoft-teams/group-chat-software
• ・日本マイクロソフト – Official Home Page：https://www.microsoft.com/ja-jp

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