【トラブルシューティング】一部のユーザーが、Outlook デスクトップクライアントや Outlook モバイル、Outlook on the Web を通じて一部の機能にアクセスできない問題が発生【EX294033】【復旧済み】

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Microsoft が提供する Microsoft 365 のサービス正常性（EX294033）にて、一部のユーザーが、Outlook デスクトップクライアントや Outlook モバイルおよび Outlook on the Web（OWA）を通じて一部の機能にアクセスできない問題が発生していることを発表しています。

なお、影響を受ける機能は以下の機能となります。

・FindTime
・ボードカレンダー
・署名

現在は、修正プログラムの展開が完了しており本事象は改善しているとのことです。

この問題は、Outlook on the Web（OWA）の改善を行う予定であった最近のアップデートに誤ったコードリグレッションが展開されたことにより発生した問題になります。

今後は、サービスアップデートの手順を見直し、テスト時に影響が検出できるように改善することで再発を防ぐとのことです。

※ この問題は影響を与えたインフラストラクチャーを通じてサービスの利用していたごく一部の限られたユーザーにて発生していた問題になります。

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Some users may be unable to access some features through Outlook desktop, Outlook mobile, and Outlook on the web – EX294033

サービス：Exchange Online

状態：Service restored

ユーザーへの影響：Users may have been unable to access some features through Outlook desktop, Outlook mobile, and Outlook on the web.

Microsoft 365 のサービス正常性（EX294033）にて、一部のユーザーが、Outlook デスクトップクライアントや Outlook モバイルおよび Outlook on the Web（OWA）を通じて一部の機能にアクセスできない問題が発生していることを発表しています。

なお、影響を受ける機能は以下の機能となります。

・FindTime
・ボードカレンダー
・署名

現在は、修正プログラムの展開が完了しており本事象は改善しているとのことです。

今後は、サービスアップデートの手順を見直し、テスト時に影響が検出できるように改善することで再発を防ぐとのことです。

October 28, 2021 9:11 AM

・Title : Some users may be unable to access some features through Outlook desktop, Outlook mobile, and Outlook on the web
・User Impact : Users may have been unable to access some features through Outlook desktop, Outlook mobile, and Outlook on the web.
・More info : The affected features included :
FindTime
Board Calendar
Signatures
・Final status : Our fix has completed deployment and we’ve confirmed via telemetry that impact is resolved.
・Scope of impact : This issue affected a very limited number of users who were served through the affected infrastructure.
・Start time : Monday, October 25, 2021, 12:53 PM (3:53 AM UTC)
・End time : Thursday, October 28, 2021, 9:02 AM (12:02 AM UTC)
・Root cause : A recent update which, while intending to improve the Outlook on the web infrastructure, inadvertently introduced a code regression that resulted in impact.
・Next steps : – We’re reviewing our service update procedures to identify opportunities to improve impact detection during testing and better prevent similar future impact.
This is the final update for the event.

October 28, 2021 1:27 AM

・Title : Some users may be unable to access some features through Outlook desktop, Outlook mobile, and Outlook on the web
・User Impact : Users may be unable to access some features through Outlook desktop, Outlook mobile, and Outlook on the web.
・More info : The affected features included :
FindTime
Board Calendar
Signatures
・Current status : We’re monitoring our fix deployment which has now remediated impact for approximately 95 percent of impacted users.
We’re expecting for the fix deployment to have completed and impact will be resolved by Thursday, October 28, 2021, at approximately 2:00 AM UTC.
・Scope of impact : This issue affects a very limited number of users who are served through the affected infrastructure.
・Start time : Monday, October 25, 2021, 12:53 PM (3:53 AM UTC)
・Estimated time to resolve : Based on current deployment progress, we expect this problem to be resolved by Thursday, October 28, 2021, at approximately 2:00 AM UTC.
・Root cause : A recent update which, while intending to improve the Outlook on the web infrastructure, inadvertently introduced a code regression that resulted in impact.
・Next update by : Thursday, October 28, 2021, 11:00 AM (2:00 AM UTC)

October 27, 2021 9:50 AM

・Title : Some users may be unable to access some features through Outlook desktop, Outlook mobile, and Outlook on the web
・User Impact : Users may be unable to access some features through Outlook desktop, Outlook mobile, and Outlook on the web.
・More info : The affected features included :
FindTime
Board Calendar
Signatures
・Current status : We’ve finished validating the fix in our internal environment.
We’re deploying the fix to the affected infrastructure and should have a mitigation timeline by our next scheduled update.
・Scope of impact : This issue affects a very limited number of users who are served through the affected infrastructure.
・Root cause : A recent update which, while intending to improve the Outlook on the web infrastructure, inadvertently introduced a code regression that resulted in impact.
・Next update by : Thursday, October 28, 2021, 3:00 AM (10/27/2021, 6:00 PM UTC)

October 27, 2021 7:23 AM

・Title : Some users may be unable to access some features through Outlook desktop, Outlook mobile, and Outlook on the web
・User Impact : Users may be unable to access some features through Outlook desktop, Outlook mobile, and Outlook on the web.
・More info : The affected features included :
FindTime
Board Calendar
Signatures
・Current status : We’re validating our fix in our internal environment before we safely deploy this change.
We’ll provide a mitigation timeline in our next update.
・Scope of impact : Impact is specific to a small subset of users who are served through the affected infrastructure.
A very limited number of customers and users appear to be impacted.
・Root cause : A recent update which, while intending to improve the Outlook on the web infrastructure, inadvertently introduced a code regression that resulted in impact.
・Next update by : Wednesday, October 27, 2021, 9:30 AM (12:30 AM UTC)

October 27, 2021 6:26 AM

・Title : Some users may be unable to access some features through Outlook desktop, Outlook mobile, and Outlook on the web
・User impact : Users may be unable to access some features through Outlook desktop, Outlook mobile, and Outlook on the web.
・More info : The affected features included :
FindTime
Board Calendar
Signatures
・Current status : We’ve identified a recent update which, while intending to improve the Outlook on the web infrastructure, inadvertently introduced a code regression that resulted in impact.
We’re identifying the affected portions of the infrastructure and are in the initial stages of developing a fix to mitigate impact.
・Scope of impact : Impact is specific to a small subset of users who are served through the affected infrastructure.
A very limited number of customers and users appear to be impacted.
・Root cause : A recent update which, while intending to improve the Outlook on the web infrastructure, inadvertently introduced a code regression that resulted in impact.
・Next update by : Wednesday, October 27, 2021, 7:30 AM (10/26/2021, 10:30 PM UTC)

October 27, 2021 6:06 AM

・Title : Some users may be unable to access some features through Outlook desktop, Outlook mobile, and Outlook on the web
・User Impact : Users may be unable to access some features through Outlook desktop, Outlook mobile, and Outlook on the web.
・More info : The affected features included :
FindTime
Board Calendar
Signatures
・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 : Impact is specific to a subset of users who are served through the affected infrastructure.

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