[RESOLVED] Microsoft O365 Multi-Factor Authentication - 11/19/2018

10:00 AM - Microsoft engineers are actively investigating an ongoing issue affecting Azure Active Directory, when Multi-Factor Authentication is required by policy. Please refer to http://status.azure.com  for updates.

12:26 PM - Microsoft engineers cycling of impacted servers is complete and initial telemetry and customer reports indicates issue is majority mitigated. Telemetry will continue until mitigation confirmed.

2:48 PM - Microsoft engineers have confirmed that the majority customers should no longer be experiencing symptoms for this issue. Customers that continue to experience issues with MFA are advised to open a support request.