Set up multi-factor authentication for Microsoft 365 - Microsoft Support

How do I set up two-step verification?

Two-Factor Authentication: Who Has It and How to Set It Up

Authenticator App - 2FASをPCとMac (アプリプレイヤー) にダウンロードして実行

NoxPlayerを使い、 Two Factor Authenticator (2FA) をPCでプレイ

Microsoft Authenticator

Research shows that 2FA and other basic measures are incredibly effective at preventing account hijacking

Keeper Fortifies Industry-best Security Architecture with Integrated Two-Factor Codes

The Best Security Key for Multi-Factor Authentication