Top 2026 2FA & AiTM Detection: Legacy Authentication Bypassing Conditional Access MFA Enforcement
Detects successful Azure AD sign-in attempts that utilize legacy or basic authentication protocols (e.g., POP, IMAP, SMTP, Exchange ActiveSync) where Conditional Access MFA enforcement was not applied. This behavior indicates a potential attempt to circumvent modern authentication security controls, often associated with AiTM-facilitated account takeover or legacy protocol abuse.
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