A single user couldn’t log in via Multi-Factor Authentication. SMS code would say it was sent, wouldn’t come through. Phone call also wouldn’t come through. Trying to set up another MFA method aka.ms/mfasetup would receive one of these errors:
You are blocked from performing this operation. Please contact your administrator for help.
We’re sorry, we ran into a problem. Please select “Next to try again.
Symptoms
Troubleshooting Steps
There’s several areas you can check for blocked users such as:
1 https://security.microsoft.com/restrictedusers
2 https://portal.azure.com/#blade/Microsoft_AAD_IAM/SecurityMenuBlade/RiskyUsers
https://portal.azure.com/#view/Microsoft_AAD_IAM/MultifactorAuthenticationMenuBlade/~/BlockedUsers/
4 Unblock User
