How to Set Up Two-Factor Authentication on Everything That Matters
Two-factor authentication (2FA) is the single most effective step a small business can take to prevent account takeovers when a password has been stolen. This guide covers the four types of second factor ranked by security strength — SMS codes (weakest), authenticator apps (Microsoft, Google, or Apple’s built-in option), passkeys (strongest for most users), and hardware keys — which accounts to protect first, and how to enforce 2FA across a Microsoft 365 organization.