Why can't I access my email in my desktop or mobile email client after enabling 2FA?

When you enable Two-Factor Authentication (2FA), mail clients that don't natively support 2FA, such as Microsoft Outlook and Apple Mail, might be unable to connect to your account. This is a security feature to ensure unauthorized devices or apps don't gain access to your emails. To restore access in such mail clients, you'll need to generate and use App Passwords.