With so many cloud services dependent on it, Azure Active Directory has become a single point of failure for Microsoft

Does Redmond have a reliability problem?

Comment  Microsoft has fixed an issue with its OneDrive and SharePoint services where users were unable to sign in, caused by a faulty remediation for the earlier Azure Active Directory outage.…

via The Register - Data Centre: Cloud
https://go.theregister.com/feed/www.theregister.com/2020/09/29/onedrive_azure_active_directory_outage/