Microsoft 365に障害発生中(緩和中)

すでに緩和策を実行中だそうです。実際私が使っているOne Driveは現在アクセス出来ています。

Microsoft 365 Service health status
https://status.office.com/
More info: Users may be unable to access any services that leverage Azure Active Directory (AAD) including Outlook, Microsoft Teams and Teams Live Events as well as Office.com. Additionally, Power Platform and Dynamics365 properties are also affected by this incident.