Microsoft’s multi-factor authentication service flakes out – again


Office 365 software boxes

Just one day after Microsoft came clean with an explanation of a Nov. 19 outage that blocked users of Office 365 from logging into their accounts using Multi-Factor Authentication (MFA), today the service again went on the fritz.

“Starting at 14:25 UTC on 27 Nov 2018, customers using Multi-Factor Authentication (MFA) may experience intermittent issues signing into Azure resources, such as Azure Active Directory, when MFA is required by policy,” read the Azure status dashboard. Two and a half hours later, the dashboard reported that after resolving a problem with an earlier DNS (Domain Name Service) issue, engineers rebooted the services. “They observed a decrease in the failure rate after the reboot cycles,” the dashboard concluded.

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