What is needed for any of the four options for Azure AD multi-factor user authentication?

A fingerprint reader is a biometric authentication device and is not required by any of the four standard Azure AD MFA verification methods.

A webcam is used for facial recognition or video purposes and is not a component of any standard Azure AD MFA option.

The four Azure AD MFA verification methods are: the Microsoft Authenticator app installed on a phone, a voice call to a phone number, an SMS text message to a phone number, and an OATH software or hardware token typically delivered via a phone app. Every option depends on the user having access to a phone, making it the one shared requirement across all methods.

An iris scan is a biometric factor not supported as a requirement for any of the four standard Azure AD MFA verification options.