We're investigating reports that users are unable to sign in to Microsoft 365 services using Multi-Factor Authentication. Admins, please see MO165510 on the Service Health Dashboard for more information. https://azure.microsoft.com/en-us/status/
Impact: Local impacts include MUNet users who have MFA enabled (all IT employees and a few dozen early-adopters) and who are either a) authenticating to a device for the first time; or b) have not selected the ‘don’t prompt me for 30 days on this device’ option’ or c) are at their 30-day MFA refresh cycle for their device. https://azure.microsoft.com/en-us/status/
Affected Applications: Office 365 applications and services which are MFA-enabled.