Hello, I suggest you check MFA requirement for the account. More info here: https://learn.microsoft.com/en-us/azure/active-directory/devices/howto-vm-sign-in-azure-ad-windows
RDP with AAD accounts
Rafael Teixeira
1
Reputation point
When trying to RDP to a VM joined to a AAD, with AAD user credentials, I got the error "The sign in method you're trying to use isn't allowed. Try a different sign-in method or contact your system administrator".
Account is in RBAC role and vm was created with the option for using AAD accounts