【トラブルシューティング】パブリックフォルダー内にサブフォルダーの作成が行えない SI（サービスインシデント）が発生！【EX394836】

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Microsoft が提供する Microsoft 365 のサービス正常性（EX394836）にて、一部のユーザーが Exchange Online のパブリックフォルダー内にサブフォルダーの作成が行えない 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。

本事象の影響を受けているユーザーでは、以下のエラーメッセージが表示されます。

“フォルダーを作成できません。”

現在、本事象のモニタリングと一部の影響を受けたユーザーからの確認により、大半のユーザーで問題なくパブリックフォルダー内にサブフォルダーの作成が行えるようになっています。

なお、影響がある環境全体に修正が展開されるまでは他ユーザーへの影響が続く可能性があります。

修正プログラムの明確な展開完了予定日についての公開は困難ではありますが、現在も展開状況をモニタリングしており、次回の定期更新で進捗状況をお知らせする予定です。

この問題は、一部のパブリックフォルダーの操作における権限チェックの処理方法を変更した結果、パブリックフォルダー内のサブフォルダー作成要求に対する権限付与に失敗することがあることにより発生している問題になります。

本事象は、パブリックフォルダー内に新しいサブフォルダーを作成しようとする一部のユーザーに影響する問題になります。

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Some users can’t create subfolders within public folders through any Exchange Online connection method – EX394836

サービス：Exchange Online

状態：Restoring service

ユーザーへの影響：Users can’t create subfolders within public folders through any Exchange Online connection method.

Microsoft 365 のサービス正常性（EX394836）にて、一部のユーザーが Exchange Online のパブリックフォルダー内にサブフォルダーの作成が行えない 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。

本事象の影響を受けているユーザーでは、以下のエラーメッセージが表示されます。

“フォルダーを作成できません。”

なお、影響がある環境全体に修正が展開されるまでは他ユーザーへの影響が続く可能性があります。

本事象は、パブリックフォルダー内に新しいサブフォルダーを作成しようとする一部のユーザーに影響する問題になります。

July 9, 2022 3:24 AM – Restoring service

・Title : Some users can’t create subfolders within public folders through any Exchange Online connection method
・User Impact : Users can’t create subfolders within public folders through any Exchange Online connection method.
・More info : Affected users see the following error message : “Cannot create the folder.”
・Current status : According to monitoring telemetry and confirmation from some formerly affected users, the majority of those previously impacted should now be able to create subfolders within public folders without issue.
Other users, however, may experience continued impact as the fix saturates throughout all affected environments.
While we’re unable to definitively pinpoint its estimated completion, we’re monitoring the deployment process and will provide more information regarding its progress via our next scheduled update.
・Scope of impact : This issue impacts some users attempting to create new subfolders within public folders.
・Start time : Thursday, June 9, 2022, 3:00 AM (6/8/2022, 6:00 PM UTC)
・Preliminary root cause : A recent change in how permission checks are handled for some public folder actions is resulting in authorization failures for subfolder creation requests in public folders.
・Next update by : Saturday, July 16, 2022, 4:30 AM (7/15/2022, 7:30 PM UTC)

July 6, 2022 3:50 AM – Restoring service

・Title : Some users can’t create subfolders within public folders through any Exchange Online connection method
・User Impact : Users can’t create subfolders within public folders through any Exchange Online connection method.
・More info : Affected users see the following error message : “Cannot create the folder.”
・Current status : The fix has reached 90 percent saturation; however, it continues to progress slower than anticipated.
Additional users will continue to see relief as the deployment progresses.
・Scope of impact : This issue impacts some users attempting to create new subfolders within public folders.
・Start time : Thursday, June 9, 2022, 3:00 AM (6/8/2022, 6:00 PM UTC)
・Preliminary root cause : A recent change in how permission checks are handled for some public folder actions is resulting in authorization failures for subfolder creation requests in public folders.
・Next update by : Saturday, July 9, 2022, 4:30 AM (7/8/2022, 7:30 PM UTC)

July 2, 2022 3:57 AM – Restoring service

・Title : Some users can’t create subfolders within public folders through any Exchange Online connection method
・User Impact : Users can’t create subfolders within public folders through any Exchange Online connection method.
・More info : Affected users see the following error message : “Cannot create the folder.”
・Current status : The fix deployment has reached over 83 percent saturation.
We expect complete remediation by the next scheduled update.
・Scope of impact : This issue impacts some users attempting to create new subfolders within public folders.
・Start time : Thursday, June 9, 2022, 3:00 AM (6/8/2022, 6:00 PM UTC)
・Preliminary root cause : A recent change in how permission checks are handled for some public folder actions is resulting in authorization failures for subfolder creation requests in public folders.
・Next update by : Wednesday, July 6, 2022, 5:00 AM (7/5/2022, 8:00 PM UTC)

July 1, 2022 4:22 AM – Restoring service

・Title : Some users can’t create subfolders within public folders through any Exchange Online connection method
・User Impact : Users can’t create subfolders within public folders through any Exchange Online connection method.
・More info : Affected users see the following error message : “Cannot create the folder.”
・Current status : The fix deployment is taking longer than expected but has reached over 65 percent saturation.
We expect complete remediation by the next scheduled update.
・Scope of impact : This issue impacts some users attempting to create new subfolders within public folders.
・Start time : Thursday, June 9, 2022, 3:00 AM (6/8/2022, 6:00 PM UTC)
・Preliminary root cause : A recent change in how permission checks are handled for some public folder actions is resulting in authorization failures for subfolder creation requests in public folders.
・Next update by : Saturday, July 2, 2022, 4:00 AM (7/1/2022, 7:00 PM UTC)

June 26, 2022 1:53 AM – Restoring service

・Title : Some users can’t create subfolders within public folders through any Exchange Online connection method
・User Impact : Users can’t create subfolders within public folders through any Exchange Online connection method.
・More info : Affected users see the following error message : “Cannot create the folder.”
・Current status : We’ve completed validation and initiated the fix deployment, which has saturated across approximately 40 percent of the affected service environment.
We estimate impact will be remediated by the end of Thursday, June 30, 2022.
・Scope of impact : This issue impacts some users attempting to create new subfolders within public folders.
・Start time : Thursday, June 9, 2022, 3:00 AM (6/8/2022, 6:00 PM UTC)
・Estimated time to resolve : We estimate impact will be remediated by the end of Thursday, June 30, 2022.
・Root cause : A recent change in how permission checks are handled for some public folder actions resulted in authorization failures for subfolder creation requests in public folders.
・Next update by : Friday, July 1, 2022, 5:00 AM (7/30/2022, 8:00 PM UTC)

June 25, 2022 10:19 AM – Restoring service

・Title : Some users can’t create subfolders within public folders through any Exchange Online connection method
・User Impact : Users can’t create subfolders within public folders through any Exchange Online connection method.
・More info : Affected users see the following error message : “Cannot create the folder.”
・Current status : We’re continuing to validate the fix to ensure the efficacy prior to deployment.
We anticipate deployment of the fix to begin by our next update time.
・Scope of impact : This issue impacts some users attempting to create new subfolders within public folders.
・Start time : Wednesday, June 22, 2022, 4:09 PM (7:09 AM UTC)
・Estimated time to resolve : We estimate impact will be remediated by the end of Thursday, June 30, 2022.
・Root cause : A recent change in how permission checks are handled for some public folder actions resulted in authorization failures for subfolder creation requests in public folders.
・Next update by : Sunday, June 26, 2022, 3:30 AM (6/25/2022, 6:30 PM UTC)

June 25, 2022 5:32 AM – Restoring service

・Title : Some users can’t create subfolders within public folders through any Exchange Online connection method
・User Impact : Users can’t create subfolders within public folders through any Exchange Online connection method.
・More info : Affected users see the following error message : “Cannot create the folder.”
・Current status : We’ve identified that a recent change in how permission checks are handled for some public folder actions resulted in authorization failures for subfolder creation request in public folders.
We’ve developed a fix to disable the permission check and are validating to ensure the efficacy of our fix prior to deployment.
・Scope of impact : This issue impacts some users attempting to create new subfolders within public folders.
・Start time : Wednesday, June 22, 2022, 4:09 PM (7:09 AM UTC)
・Root cause : A recent change in how permission checks are handled for some public folder actions resulted in authorization failures for subfolder creation request in public folders.
・Next update by : Saturday, June 25, 2022, 12:00 PM (3:00 AM UTC)

June 24, 2022 12:02 PM – Restoring service

・Title : Some users can’t create new subfolders within public folders in any Outlook app
・User Impact : Users are unable to create new subfolders within public folders in any Outlook app.
・More info : Affected users see the following error message : “Cannot create the folder.”
・Current status : Our investigation thus far has been inconclusive and our efforts to reproduce the issue have been unsuccessful.
We’re reviewing Problem Steps Recorder (PSR) logs provided by some affected users to better understand the full extent of the impact, which will help us attempt to reproduce the issue.
We’re reaching out to some affected users to request Fiddler trace logs so that we can identify the root cause of the impact.
・Scope of impact : This issue impacts some users attempting to create new subfolders within public folders.
・Next update by : Tuesday, June 28, 2022, 6:00 PM (9:00 AM UTC)

June 24, 2022 9:55 AM – Restoring service

・Title : Users can’t create new subfolders within public folders in any Outlook app
・User Impact : Users are unable to create new subfolders within public folders in any Outlook app.
・More info : Affected users see the following error message : “Cannot create the folder.”
・Current status : We’re continuing to analyze available diagnostic data to try to isolate and reproduce the issue.
・Scope of impact : This issue impacts some users attempting to create new subfolders within public folders.
・Next update by : Friday, June 24, 2022, 12:00 PM (3:00 AM UTC)

June 24, 2022 8:37 AM – Restoring service

・Title : Users can’t create new subfolders within public folders in any Outlook app
・User Impact : Users are unable to create new subfolders within public folders in any Outlook app.
・More info : Affected users see the following error message : “Cannot create the folder.”
・Current status : We’re analyzing error details and available diagnostic data to determine the source of the issue.
・Scope of impact : This issue impacts some users attempting to create new subfolders within public folders.
・Next update by : Friday, June 24, 2022, 10:00 AM (1:00 AM UTC)

June 24, 2022 8:09 AM – Restoring service

・Title : Users can’t create new subfolders within public folders in any Outlook app
・User Impact : Users are unable to create new subfolders within public folders in any Outlook app.
・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 : This issue impacts some users attempting to create new subfolders within public folders.

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【トラブルシューティング】パブリックフォルダー内にサブフォルダーの作成が行えない SI（サービスインシデント）が発生！【EX394836】