【トラブルシューティング】一部の Android 11 のデバイスで Microsoft Teams の通話や会議の受信および発信が行えない SI（サービス インシデント）が発生【TM295750】

Microsoft が提供する Microsoft 365 のサービス正常性（TM295750）にて、一部の Android 11 のデバイスで Microsoft Teams の通話や会議の受信および発信ができない SI（サービス インシデント）が発生していることを発表しています。

この問題の影響を受けている Android 11 のデバイスでは、ユーザーが Microsoft Teams の通話や会議の発信が行えず、着信した通話や会議が 5 ～ 10 秒後に切断されます。

現在は、Microsoft Teams のモバイル アプリのアップデートの配信を完了したことを確認しており、Google Play ストアより最新のバージョンにアップデートする必要があります。

この問題は、Android 11 向けの Microsoft Teams の最新バージョン（1.0.0.2021163901）に Microsoft Teams のネットワークにアクセスする機能に影響するコード上の問題が含まれていたことにより発生している問題になります。

今後は同様の問題が発生しないように検証やアップデートの手順を見直すとのことです。

※ Microsoft Teams の最新バージョン（1.0.0.2021163901）をインストールしている一部の Android 11 デバイスのユーザーにて発生している問題になります。

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 のメッセージ センター関連情報一覧

Microsoft Teams サービス正常性 関連記事一覧

Some users’ Microsoft Teams calls or meetings are dropping when received or placed on some Android 11 devices – TM295750

サービス：Microsoft Teams

状態：Service restored

ユーザーへの影響：Admins will see incorrect stream rates for VBSS sessions in the Microsoft Teams Call Quality Dashboard.

Microsoft 365 のサービス正常性（TM295750）にて、一部の Android 11 のデバイスで Microsoft Teams の通話や会議の受信および発信ができない SI（サービス インシデント）が発生していることを発表しています。

この問題の影響を受けている Android 11 のデバイスでは、ユーザーが Microsoft Teams の通話や会議の発信が行えず、着信した通話や会議が 5 ～ 10 秒後に切断されます。

現在は、Microsoft Teams のモバイル アプリのアップデートの配信を完了したことを確認しており、Google Play ストアより最新のバージョンにアップデートする必要があります。

この問題は、Android 11 向けの Microsoft Teams の最新バージョン（1.0.0.2021163901）に Microsoft Teams のネットワークにアクセスする機能に影響するコード上の問題が含まれていたことにより発生している問題になります。

今後は同様の問題が発生しないように検証やアップデートの手順を見直すとのことです。

※ Microsoft Teams の最新バージョン（1.0.0.2021163901）をインストールしている一部の Android 11 デバイスのユーザーにて発生している問題になります。

November 11, 2021 8:22 AM

• ・Title : Some users’ Microsoft Teams calls or meetings are dropping when received or placed on some Android 11 devices
• ・User Impact : Users’ Microsoft Teams calls or meetings were dropping when received or placed on some Android 11 devices.
• ・More info : Users couldn’t place outbound calls or meetings from impacted Android 11 devices, and inbound calls or meetings were dropping after five to ten seconds.
• ・Final status : We’ve confirmed that the update deployment is complete.
• Affected users will need to update their devices to the latest build via the Google Play store to receive the fix and resolve this issue.
• ・Scope of impact : This issue affected some Android 11 device users.
• ・Start time : Saturday, October 30, 2021, 8:50 AM (10/29/2021, 11:50 PM UTC)
• ・End time : Tuesday, November 9, 2021, 3:18 PM (6:18 AM UTC)
• ・Root cause : The most recent version (version 1.0.0.2021163901) of the Microsoft Teams app for Android 11 contained a code issue affecting the ability of impacted devices from accessing the Microsoft Teams network, resulting in impact.
• Next steps : – We’re reviewing our validation and update procedures to catch issues like this prior to deployment in the future.
• This is the final update for the event.

November 5, 2021 7:27 AM

• ・Title : Some users’ Microsoft Teams calls or meetings are dropping when received or placed on some Android 11 devices
• ・User Impact : Users’ Microsoft Teams calls or meetings are dropping when received or placed on some Android 11 devices.
• ・More info : Users can’t place outbound calls or meetings from impacted Android 11 devices, and inbound calls or meetings are dropping after five to ten seconds.
• ・Current status : We’ve validated our update to the Microsoft Teams Android app both internally and externally and have confirmed that it resolves the issue.
• We’ve begun rolling the update out and are gathering additional data while we move forward with this process to ensure it progresses as expected.
• ・Scope of impact : This issue affects some Android 11 device users.
• ・Start time : Saturday, October 30, 2021, 8:50 AM (10/29/2021, 11:50 PM UTC)
• ・Root cause : The most recent version (version 1.0.0.2021163901) of the Microsoft Teams app for Android 11 contains a code issue affecting the ability of impacted devices from accessing the Microsoft Teams network, resulting in impact.
• ・Next update by : Thursday, November 11, 2021, 10:00 AM (1:00 AM UTC)

November 4, 2021 7:30 AM

• ・Title : Some users’ Microsoft Teams calls or meetings are dropping when received or placed on some Android 11 devices
• ・User Impact : Users’ Microsoft Teams calls or meetings are dropping when received or placed on some Android 11 devices.
• ・More info : Users cannot place outbound calls or meetings from impacted Android 11 devices, and inbound calls or meetings are dropping after five to ten seconds.
• ・Current status : We’ve developed an update to the Microsoft Teams Android app and are in the process of validating it both internally and externally to confirm it resolves the issue.
• We expect to have a deployment timeline by the next scheduled update.
• ・Scope of impact : This issue affects some Android 11 device users.
• ・Start time : Saturday, October 30, 2021, 8:50 AM (10/29/2021, 11:50 PM UTC)
• ・Root cause : The most recent version (version 1.0.0.2021163901) of the Microsoft Teams app for Android 11 contains a code issue affecting the ability of impacted devices from accessing the Microsoft Teams network, resulting in impact.
• ・Next update by : Friday, November 5, 2021, 9:00 AM (12:00 AM UTC)

November 3, 2021 10:58 AM

• ・Title : Some users’ Microsoft Teams calls or meetings are dropping when received or placed on some Android 11 devices
• ・User impact : Users’ Microsoft Teams calls or meetings are dropping when received or placed on some Android 11 devices.
• ・More info : Users cannot place outbound calls or meetings from impacted Android 11 devices, and inbound calls or meetings are dropping after five to ten seconds.
• ・Current status : We’ve determined that the most recent version (version 1.0.0.2021163901) of the Microsoft Teams app for Android 11 is inadvertently impacting some Android 11 devices.
• We’re developing a fix, which will then be validated before being deployed to the affected environment.
• ・Scope of impact : This issue affects some Android 11 device users.
• ・Start time : Saturday, October 30, 2021, 8:50 AM (10/29/2021, 11:50 PM UTC)
• ・Root cause : The most recent version (version 1.0.0.2021163901) of the Microsoft Teams app for Android 11 is inadvertently impacting some Android 11 devices.
• ・Next update by : Thursday, November 4, 2021, 9:00 AM (12:00 AM UTC)

November 3, 2021 9:19 AM

• ・Title : Some users’ Microsoft Teams calls are dropping when received or placed to some Android 11 devices
• ・User Impact : Users’ Microsoft Teams calls are dropping when received or placed to some Android 11 devices.
• ・More info : Users cannot place outbound calls from impacted Android 11 devices, and inbound calls are dropping after five to ten seconds.
• ・Current status : We’re analyzing call logs to determine if any changes to the Microsoft Teams or Android 11 versions may be causing the impact.
• ・Scope of impact : This issue affects some Android 11 device users.
• ・Next update by : Wednesday, November 3, 2021, 11:30 AM (2:30 AM UTC)

November 3, 2021 7:14 AM

• ・Title : Around 1,400 users’ Microsoft Teams calls are dropping when received or placed to Android 11 devices
• ・User Impact : Users’ Microsoft Teams calls are dropping when received or placed to Android 11 devices.
• ・More info : Users cannot place outbound calls from impacted devices, and inbound calls are dropping after five to ten seconds.
• ・Current status : We’re continuing the review of provided CallIDs in conjunction with network traces to assist in the root cause investigation.
• ・Scope of impact : Your organization is affected by this event, and around 1,400 Microsoft Teams users are affected.
• ・Next update by: Wednesday, November 3, 2021, 10:00 AM (1:00 AM UTC)

November 3, 2021 4:22 AM

• ・Title : Voice calls received on Android 11 handsets signed into Microsoft Teams are intermittently disconnecting
• ・User Impact : Users receiving calls on Android 11 handsets signed into Microsoft Teams are intermittently disconnected.
• ・Current status : We’ve enabled enhanced network trace logging in the affected environment, and we’re analyzing the resulting logs to determine our next troubleshooting steps.
• ・Scope of impact : Your organization is affected by this event, and any user answering calls using an Android 11 handset logged into Microsoft Teams is intermittently affected.
• ・Next update by : Wednesday, November 3, 2021, 8:00 AM (11/2/2021, 11:00 PM UTC)

November 3, 2021 2:47 AM

• ・Title : Voice calls received on Android 11 handsets signed into Microsoft Teams are intermittently disconnecting
• ・User Impact : Users receiving calls on Android 11 handsets signed into Microsoft Teams are intermittently disconnected.
• ・Current status : We’re investigating network trace logs provided by your organization in order to better understand the issue and formulate a strategy for mitigation
• ・Scope of impact : Your organization is affected by this event, and any user answering calls using an Android 11 handset logged into Microsoft Teams is intermittently affected.
• ・Next update by : Wednesday, November 3, 2021, 5:00 AM (11/2/2021, 8:00 PM UTC)

November 3, 2021 2:25 AM

• ・Title : Voice calls received on Android 11 handsets signed into Microsoft Teams are intermittently disconnecting
• ・User Impact : Users receiving calls on Android 11 handsets signed into Microsoft Teams are intermittently disconnected.
• ・Current status : We’re investigating a potential issue and checking for impact to your organization.
• We’ll provide an update within 30 minutes.
• ・Scope of impact : Your organization is affected by this event, and any user answering calls using an Android 11 handset logged into Microsoft Teams is intermittently affected.

関連リンク

• ・What are Microsoft Teams live events? – Microsoft Teams｜Microsoft Docs：https://docs.microsoft.com/ja-jp/microsoftteams/teams-live-events/what-are-teams-live-events
• ・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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