

English is also used by default if the browser locale can't be identified. Network Policy Server (NPS) will always use English by default, regardless of custom greetings. If you use custom greetings but don’t have one for the language identified in the browser locale, English is used by default. The prompt language is determined by browser locale settings.

The verification prompts are part of the Azure AD sign-in, which automatically requests and processes the MFA challenge when needed. You don't need to change apps and services to use Azure AD Multi-Factor Authentication. Administrators can choose forms of secondary authentication and configure challenges for MFA based on configuration decisions. When users register themselves for Azure AD Multi-Factor Authentication, they can also register for self-service password reset in one step.

If the password is weak or has been exposed elsewhere, an attacker could be using it to gain access. If you only use a password to authenticate a user, it leaves an insecure vector for attack.

Multi-factor authentication is a process in which users are prompted during the sign-in process for an additional form of identification, such as a code on their cellphone or a fingerprint scan.
