After investigating the November 19 worldwide multi-factor-authentication outage, Microsoft’s Azure team has revealed the root causes of the disruption that affected a number of its users.
The team has discovered three independent root causes along with monitoring gaps that resulted in Azure, Office 365, Dynamics and other Microsoft users from being unable to authenticate for most of that day.
Microsoft’s Azure Active Directory Multi-Factor Authentication (MFA) services were down for many customers for 14 hours on November 19 and since Office 365 and Dynamics also use this service to authenticate, their users were also affected.
