Microsoft が提供する Microsoft 365 のサービス正常性（TM394877）にて、認証済みプロキシ サーバー経由で Microsft Teams デスクトップ クライアントにユーザーがアクセスできないアドバイザリが発生しています。

Microsoft が提供する Microsoft 365 のサービス正常性（TM394877）にて、認証済みプロキシ サーバー経由で Microsft Teams デスクトップ クライアントにユーザーがアクセスできないアドバイザリが発生しています。

本事象が発生しているユーザーでは、Microsft Teams ブラウザー版からサインインを行うことで回避が可能となっていました。

なお、認証済みプロキシ サーバー経由でサインインしないユーザーにも影響がない問題になります。

現在は、修復プログラムの展開が正常に完了したことを確認しており、影響を受けた一部のユーザーから問題が解決したとの報告を受けているとのことです。

この問題は、最近のアップデートにコード リグレッションが含まれており、その影響により発生している問題になります。

Microsoft Teams 目指せ達人 基本&活用術

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目次

Users can’t access the Microsoft Teams desktop app via authenticated proxy servers – TM394877

サービス：Microsoft Teams

状態：Service restored

ユーザーへの影響：Users are unable to sign in to the Microsoft Teams desktop app via authenticated proxy servers.

Microsoft 365 のサービス正常性（TM394877）にて、認証済みプロキシ サーバー経由で Microsft Teams デスクトップ クライアントにユーザーがアクセスできないアドバイザリが発生しています。

本事象が発生しているユーザーでは、Microsft Teams ブラウザー版からサインインを行うことで回避が可能となっていました。

なお、認証済みプロキシ サーバー経由でサインインしないユーザーにも影響がない問題になります。

現在は、修復プログラムの展開が正常に完了したことを確認しており、影響を受けた一部のユーザーから問題が解決したとの報告を受けているとのことです。

この問題は、最近のアップデートにコード リグレッションが含まれており、その影響により発生している問題になります。

July 7, 2022 1:14 AM

• ・Title : Users can’t access the Microsoft Teams desktop app via authenticated proxy servers
• ・User Impact : Users were unable to sign in to the Microsoft Teams desktop app via authenticated proxy servers.
• ・More info : While we were focused on remediation, users could have accessed Microsoft Teams through the web client.
• Additionally, users who didn’t sign in via authenticated proxy servers were unaffected.
• ・Final status : We’ve confirmed that the deployment of our fix has successfully completed, and we’ve received reports from some affected users that this has resolved the issue.
• ・Scope of impact : Any user attempting to sign in to the Microsoft Teams desktop app using an authenticated proxy server was impacted.
• ・Start time : Friday, May 27, 2022, 5:56 AM (5/26/2022, 8:56 PM UTC)
• ・End time : Wednesday, July 6, 2022, 7:43 AM (7/5/2022, 10:43 PM UTC)
• ・Root cause : A recent service update contained a code regression which was resulting in impact.
• ・Next steps : – We’re reviewing our update procedures to better identify similar issues during our development and testing cycles.
• This is the final update for the event.

June 30, 2022 2:36 AM

• ・Title : Users can’t access the Microsoft Teams desktop app via authenticated proxy servers
• ・User Impact : Users are unable to sign in to the Microsoft Teams desktop app via authenticated proxy servers.
• ・More info : While we’re focused on remediation, users can access Microsoft Teams through the web client.
• Additionally, users who don’t sign in via authenticated proxy servers (such as when they work from home) are unaffected.
• ・Current status : We’ve observed via service telemetry that the deployment of our fix currently stands at 25 percent saturation.
• We’re continuing to monitor its progress and expect that users may see remediation during this process as this fix reaches their environment.
• ・Scope of impact : Any user attempting to sign in to the Microsoft Teams desktop app using an authenticated proxy server is impacted.
• ・Start time : Friday, June 10, 2022, 9:00 PM (12:00 PM UTC)
• ・Estimated time to resolve : We expect this issue to be completely resolved for all affected users by Wednesday, July 6, 2022, as the fix is safely implemented through our change management process.
• ・Root cause : A recent service update contains a code regression, resulting in impact.
• ・Next update by : Thursday, July 7, 2022, 3:00 AM (7/6/2022, 6:00 PM UTC)

June 29, 2022 1:10 AM

• ・Title : Users can’t access the Microsoft Teams desktop app via authenticated proxy servers
• ・User Impact : Users are unable to sign in to the Microsoft Teams desktop app via authenticated proxy servers.
• ・More info : While we’re focused on remediation, users can access Microsoft Teams through the web client.
• Additionally, users who don’t sign in via authenticated proxy servers (such as when they work from home) are unaffected.
• ・Current status : We’ve successfully completed validating the fix and have begun its deployment, which according to service telemetry, currently stands at 10 percent saturation.
• We’re continuing to monitor the deployment and users may see remediation during this process as this fix reaches their environment.
• ・Scope of impact : Any user attempting to sign in to the Microsoft Teams desktop app using an authenticated proxy server is impacted.
• ・Start time : Friday, June 10, 2022, 9:00 PM (12:00 PM UTC)
• ・Root cause : A recent service update contains a code regression, resulting in impact.
• ・Next update by : Thursday, June 30, 2022, 3:00 AM (6/29/2022, 6:00 PM UTC)

June 28, 2022 2:25 AM

• ・Title : Users can’t access the Microsoft Teams desktop app via authenticated proxy servers
• ・User Impact : Users are unable to sign in to the Microsoft Teams desktop app via authenticated proxy servers.
• ・More info : While we’re focused on remediation, users can access Microsoft Teams through the web client.
• Additionally, users who don’t sign in via authenticated proxy servers (such as when they work from home) are unaffected.
• ・Current status : Our review of recent changes has confirmed that a recent service update contains a code regression, resulting in impact.
• We’ve developed and validated a fix which is currently deploying to all impacted infrastructure.
• We expect to have a remediation timeline by the next scheduled update.
• ・Scope of impact : Any user attempting to sign in to the Microsoft Teams desktop app using an authenticated proxy server is impacted.
• ・Start time : Friday, June 10, 2022, 9:00 PM (12:00 PM UTC)
• ・Root cause : A recent service update contains a code regression, resulting in impact.
• ・Next update by: Thursday, June 30, 2022, 3:00 AM (6/29/2022, 6:00 PM UTC)

June 25, 2022 1:39 AM

• ・Title : Users can’t access the Microsoft Teams desktop app via authenticated proxy servers
• ・User Impact : Users are unable to sign in to the Microsoft Teams desktop app via authenticated proxy servers.
• ・More info : While we’re focused on remediation, users can access Microsoft Teams through the web client.
• Additionally, users who don’t sign in via authenticated proxy servers (such as when they work from home) are unaffected.
• ・Current status : We’ve compared previous build versions and suspect that there is an issue with build 1.5.00.12969.
• We’re doing an extensive assessment of this potential offending build and we’re reviewing newly gathered network traces to isolate the source of impact.
• ・Scope of impact : Any user attempting to sign in to the Microsoft Teams desktop app using an authenticated proxy server is impacted.
• ・Next update by : Tuesday, June 28, 2022, 3:00 AM (6/27/2022, 6:00 PM UTC)

June 24, 2022 6:57 PM

• ・Title : Users can’t access the Microsoft Teams desktop app via authenticated proxy servers
• ・User Impact : Users are unable to sign in to the Microsoft Teams desktop app via authenticated proxy servers.
• ・More info : While we’re focused on remediation, users can access Microsoft Teams through the web client.
• Additionally, users who don’t sign in via authenticated proxy servers (such as when they work from home) are unaffected.
• ・Current status : Our review of build versions is taking longer than expected to complete.
• We suspect that there is an issue with build 1.5.00.12969, and we’re comparing with previous build versions confirm this as the root cause, before developing a plan for remediation.
• ・Scope of impact : Any user attempting to sign in to the Microsoft Teams desktop app using an authenticated proxy server is impacted.
• ・Next update by : Saturday, June 25, 2022, 2:00 AM (6/24/2022, 5:00 PM UTC)

June 24, 2022 4:51 PM

• ・Title : Users can’t access the Microsoft Teams desktop app via authenticated proxy servers
• ・User Impact : Users are unable to sign in to the Microsoft Teams desktop app via authenticated proxy servers.
• ・More info : While we’re focused on remediation, users can access Microsoft Teams through the web client.
• Additionally, users who don’t sign in via authenticated proxy servers (such as when they work from home) are unaffected.
• ・Current status : We’re continuing our review into the deployment, to isolate the source of the root cause of impact.
• ・Scope of impact : Any user attempting to sign in to the Microsoft Teams desktop app using an authenticated proxy server is impacted.
• ・Next update by : Friday, June 24, 2022, 7:00 PM (10:00 AM UTC)

June 24, 2022 3:33 PM

• ・Title : Users can’t access the Microsoft Teams desktop app via authenticated proxy servers
• ・User Impact : Users are unable to sign in to the Microsoft Teams desktop app via authenticated proxy servers.
• ・More info : While we’re focused on remediation, users can access Microsoft Teams through the web client.
• Additionally, users who don’t sign in via authenticated proxy servers (such as when they work from home) are unaffected.
• ・Current status : Our analysis thus far of the provided network trace logs suggests the impact may be occurring because of a deployment.
• We’re reviewing the deployment to determine if it’s the source of the issue
• ・Scope of impact : Any user attempting to sign in to the Microsoft Teams desktop app using an authenticated proxy server is impacted.
• ・Next update by : Friday, June 24, 2022, 5:00 PM (8:00 AM UTC)

June 24, 2022 3:05 PM

• ・Title : Some users can’t access the Microsoft Teams desktop app
• ・User Impact : Users are unable to sign in to the Microsoft Teams desktop app.
• ・More info : While we’re focused on remediation, users may be able to access Microsoft Teams through the web client.
• ・Current status : We’ve received the requested network trace logs from some affected users, so we’ve resumed our investigation of the impact associated with TM391711.
• Scope of impact : Your organization is affected by this event, and some users attempting to sign in to the Microsoft Teams desktop app are impacted.

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。

Microsoft Teams 関連記事一覧

Microsoft Teams のメッセージ センター関連記事一覧

Microsoft Teams サービス正常性 関連記事一覧

関連リンク

• ・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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