【トラブルシューティング】Microsoft Teams の “通話分析” を Graph API 経由で取得している場合に断続的にタイム アウトまたは処理が遅くなっていた問題が発生【TM286936】【復旧済み】

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Microsoft が提供する Microsoft 365 のサービス正常性（TM286936）にて、”Microsoft Teams 管理センター” – [ユーザー] – [ユーザーを管理] から該当ユーザーを選択し、表示される [ユーザーのプロファイル ページ] 内の [会議と通話] 内の “通話分析” を Graph API 経由で取得していた場合に断続的にタイム アウトまたは処理が遅くなる問題が発生していたことを “アドバイザリ” で発表しています。

この問題は、修正プログラムの展開中に Graph API インフラストラクチャーの一部で通常よりも高い使用率があったために影響していたとのことです。

上記問題に対して、通常よりも高い使用率を緩和するための変更を適用し、2 次的な修正プログラムの開発と展開が完了することでサービスの回復を確認しているとのことです。

なお、今後はトラフィックの処理を改善し、通常よりも高い使用量を防ぐための方法を検討しているとのことです。

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Some users are unable to @mention other users within Microsoft Teams chats when using the desktop client – TM286629

サービス：Microsoft Teams

状態：Service restored

ユーザーへの影響：Users are unable to @mention other users within Microsoft Teams chats when using the desktop client.

Microsoft 365 のサービス正常性（TM286936）にて、”Microsoft Teams 管理センター” – [ユーザー] – [ユーザーを管理] から該当ユーザーを選択し、表示される [ユーザーのプロファイル ページ] 内の [会議と通話] 内の “通話分析” を Graph API 経由で取得していた場合に断続的にタイム アウトまたは処理が遅くなる問題が発生していたことを “アドバイザリ” で発表しています。

この問題は、修正プログラムの展開中に Graph API インフラストラクチャーの一部で通常よりも高い使用率があったために影響していたとのことです。

上記問題に対して、通常よりも高い使用率を緩和するための変更を適用し、2 次的な修正プログラムの開発と展開が完了することでサービスの回復を確認しているとのことです。

なお、今後はトラフィックの処理を改善し、通常よりも高い使用量を防ぐための方法を検討しているとのことです。

September 24, 2021 1:47 PM – Service restored

• ・Title : Admins’ call record query searches through Graph API intermittently time-out or process slowly
• ・User Impact : Admins’ call record query searches through Graph API intermittently timed-out or processed slowly.
• ・More info : This issue previously impacted Call Analytics query searches in the Microsoft Teams admin center.
• ・Final status : We’ve finished developing and deploying the secondary fix.
• While the fix was deploying, we found higher than normal usage on a portion of Graph API infrastructure that was contributing to impact.
  We’ve applied a change to alleviate the higher than normal usage and confirmed via telemetry that service is restored.
• ・Scope of impact : All admins utilizing CallRecords query searches through Graph API may have been intermittently impacted.
• ・Start time : Thursday, September 23, 2021, 12:00 AM (9/22/2021, 3:00 PM UTC)
• ・End time : Friday, September 24, 2021, 12:00 PM (3:00 AM UTC)
• ・Root cause : Traffic processing inefficiencies related to the Graph API, combined with a higher than normal usage on a portion of Graph API infrastructure, resulted in impact.
• ・Next steps :
• – We’re reviewing methods for improving the processing of traffic and preventing higher than normal usage in the future.
• This is the final update for the event.

September 24, 2021 10:53 AM – Service restored

• ・Title : Admins’ call record query searches through Graph API intermittently time-out or process slowly
• ・User Impact : Admins’ call record query searches through Graph API intermittently time-out or process slowly.
• ・More info : This issue previously impacted Call Analytics query searches in the Microsoft Teams admin center.
• ・Current status : We’re continuing to develop the secondary fix, which we’ll then validate and deploy to resolve the residual impact.
• ・Scope of impact : All admins utilizing CallRecords query searches through Graph API may intermittently see impact.
• ・Start time : Thursday, September 23, 2021, 12:00 AM (9/22/2021, 3:00 PM UTC)
• ・Root cause : Traffic processing inefficiencies related to the Graph API are causing call record query searches through Graph API to intermittently time-out or process slowly.
• ・Next update by : Saturday, September 25, 2021, 6:00 AM (9/24/2021, 9:00 PM UTC)

September 24, 2021 9:31 AM – Service restored

• ・Title : Admins’ call record query searches through Graph API intermittently time-out or process slowly
• ・User Impact : Admins’ call record query searches through Graph API intermittently time-out or process slowly.
• ・More info : This issue previously impacted Call Analytics query searches in the Microsoft Teams admin center.
• ・Current status : The deployment has completed and has improved memory usage patterns related to the Graph API.
• It has not fully mitigated impact for some admins, and so we’re developing a secondary deployment to resolve the residual impact.
• ・Scope of impact : All admins utilizing CallRecords query searches through Graph API may intermittently see impact.
• ・Start time : Thursday, September 23, 2021, 12:00 AM (9/22/2021, 3:00 PM UTC)
• ・Root cause : Traffic processing inefficiencies related to the Graph API are causing call record query searches through Graph API to intermittently time-out or process slowly.
• ・Next update by: Friday, September 24, 2021, 12:30 PM (3:30 AM UTC)

September 24, 2021 9:31 AM – Service restored

• ・Title : Admins’ call record query searches through Graph API intermittently time-out or process slowly
• ・User Impact : Admins’ call record query searches through Graph API intermittently time-out or process slowly.
• ・More info : This issue previously impacted Call Analytics query searches in the Microsoft Teams admin center.
• ・Current status : The deployment has completed and has improved memory usage patterns related to the Graph API.
• It has not fully mitigated impact for some admins, and so we’re developing a secondary deployment to resolve the residual impact.
• ・Scope of impact : All admins utilizing CallRecords query searches through Graph API may intermittently see impact.
• ・Start time : Thursday, September 23, 2021, 12:00 AM (9/22/2021, 3:00 PM UTC)
• ・Root cause : Traffic processing inefficiencies related to the Graph API are causing call record query searches through Graph API to intermittently time-out or process slowly.
• ・Next update by: Friday, September 24, 2021, 12:30 PM (3:30 AM UTC)

September 24, 2021 8:01 AM – Service restored

• ・Title : Admins’ call record query searches through Graph API intermittently time-out or process slowly
• ・User Impact : Admins’ call record query searches through Graph API intermittently time-out or process slowly.
• ・More info : This issue previously impacted Call Analytics query searches in the Microsoft Teams admin center.
• ・Current status : After investigating the issue, we’ve found that traffic processing inefficiencies related to the Graph API are causing the issue.
• We’ve developed and validated a code fix that reduces memory consumption under certain circumstances, thus improving traffic processing speeds to resolve the issue.
• The fix has begun deployment and we expect to have an estimated time for completion by the next update time.
• ・Scope of impact : All admins utilizing CallRecords query searches through Graph API may intermittently see impact.
• ・Start time : Thursday, September 23, 2021, 12:00 AM (9/22/2021, 3:00 PM UTC)
• ・Root cause : Traffic processing inefficiencies related to the Graph API are causing call record query searches through Graph API to intermittently time-out or process slowly.
• ・Next update by : Friday, September 24, 2021, 10:30 AM (1:30 AM UTC)

September 24, 2021 6:33 AM – Service restored

• ・Title : Admins intermittently experience slow or timed-out call records query searches through Graph API
• ・User Impact : Admins intermittently experience slow or timed-out call records query searches through Graph API.
• ・More info : Admins were previously experiencing slow or timed-out Call Analytics query searches in the Microsoft Teams admin center.
• ・Current status : Through our service telemetry we’ve validated that our previous mitigation efforts were effective for restoring functionality for the Call Analytics queries through the Microsoft Teams admin center, although we’re still investigating the root cause of that impact.
• Meanwhile, we’ve found that there’s also impact within the call records query searches through Graph API, and we’re rerouting traffic to alternate infrastructure and increasing concurrent connections to Graph API as a potential mitigation.
• We’re also reviewing infrastructure telemetry and API response codes to diagnose the root cause.
• ・Scope of impact : All admins utilizing call records query searches through Graph API may intermittently see impact.
• ・Start time: Thursday, September 23, 2021, 12:00 AM (9/22/2021, 3:00 PM UTC)
• ・Next update by : Friday, September 24, 2021, 8:30 AM (9/23/2021, 11:30 PM UTC)

September 24, 2021 4:08 AM – Service restored

• ・Title : Admins intermittently experience slow or timed-out Call Analytics query searches in the Microsoft Teams admin center
• ・User Impact : Admins intermittently experience slow or timed-out Call Analytics query searches in the Microsoft Teams admin center.
• ・Current status : We’ve rerouted the affected traffic to an alternate section of infrastructure to potentially mitigate some of the impact causing the Call Analytics query to misfunction.
• We’re contacting some affected users to validate if this was effective.
• Our investigation into the root cause has been inconclusive; however, we’re continuing to review available data for the cause of this event in order to find a path to a more permanent mitigation.
• ・Scope of impact : All admins utilizing the Call Analytics query searches within the Microsoft Teams admin center may intermittently see impact.
• ・Start time : Thursday, September 23, 2021, 12:00 AM (9/22/2021, 3:00 PM UTC)
• ・Next update by : Friday, September 24, 2021, 6:30 AM (9/23/2021, 9:30 PM UTC)

September 24, 2021 3:09 AM – Service restored

• ・Title : Admins intermittently experience slow or timed-out Call Analytics query searches in the Microsoft Teams admin center
• ・User Impact : Admins intermittently experience slow or timed-out Call Analytics query searches in the Microsoft Teams admin center.
• ・Current status : We’re continuing to investigate correlated service logs, infrastructure telemetry, and API response codes to isolate the underlying cause of this issue and help us develop a sustainable mitigation strategy.
• In parallel, we’re rerouting the affected traffic to an alternate section of infrastructure in an attempt to quickly restore Call Analytics query search functionality.
• ・Scope of impact : All admins utilizing the Call Analytics query searches within the Microsoft Teams admin center may intermittently see impact.
• ・Next update by : Friday, September 24, 2021, 4:30 AM (9/23/2021, 7:30 PM UTC)

September 24, 2021 2:32 AM – Service restored

• ・Title : Admins intermittently experience slow or timed-out Call Analytics query searches in the Microsoft Teams admin center
• ・User Impact : Admins intermittently experience slow or timed-out Call Analytics query searches in the Microsoft Teams admin center.
• ・Current status: We’re investigating a potential issue and checking for impact to your organization.
• We’ll provide an update within 30 minutes.

関連リンク

• ・通話分析を使用して低品質な通話をトラブルシューティングする – Microsoft Teams｜Microsoft Docs：https://docs.microsoft.com/ja-jp/microsoftteams/use-call-analytics-to-troubleshoot-poor-call-quality
• ・ユーザーの通話分析を設定Microsoft Teams – Microsoft Teams｜Microsoft Docs：https://docs.microsoft.com/ja-jp/microsoftteams/set-up-call-analytics
• ・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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