Multi-factor authentication (MFA) adds a second step when you sign in to Alvys. After you enter your password, you confirm it's you with a code or device.
The full guide covers:
Setting up MFA with an authenticator app, a text message (SMS), or a security key
Adding a second method so you're never locked out
What to do if you lose or change your phone
Fixes for codes that don't arrive or aren't accepted
Also known as: two-factor authentication, 2FA, verification code, authenticator app, security key.