When Azure subscription is changed,due to a provider change, Azure Multi-Factor Authentication(AKA, MFA) must be unregistered and registered again by following method. 1. Un-register MFA provider, on ADFS Global Authentication Policy, uncheck WindowsAzureMultiFactorAuthentication checkbox. Go to PowerShell prompt, then run PS C:\Program Files\Multi-Factor Authentication Server> Unregister-AdfsAuthenticationProvider –Name "WindowsAzureMultiFactorAuthentication" WARNING: PS0103: The authentication provider was successfully unregistered from the policy store. Restart the A D FS Windows Service on each server in the farm. Restart ADFS services PS C:\Program Files\Multi-Factor Authentication Server> net stop adfssrv The Active Directory Federation Services service is stopping..... The Active Directory Federation Services service was stopped successfully. PS C:\Program Files\Multi-Factor Authentication Server> net start adfssrv The Active Directo...
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