First, download the Microsoft Authenticator app, which is available for iOS and Android, and log in. Select the Security tab, ...

Kurt Knutsson the CyberGuy explains why two-factor authentication will improve security on all your devices, and shows you how to enable it on your devices.

Two-factor authentication is an additional step that helps secure your login with a temporary code you need to obtain before logging in.

Yahoo Finance's Dan Howley discusses what is two-factor authentication and how to use it.