Zero Trust Compliance
ID-02High

Block Legacy Authentication for Zero Trust Compliance

Learn how ID-02 helps you meet Zero Trust requirements for Microsoft 365 and Entra ID security.

Meeting Zero Trust standards for Microsoft 365 involves implementing controls like ID-02 (Block Legacy Authentication). This guide covers the specific Zero Trust requirements addressed by this control and how to achieve compliance.

How ID-02 Addresses Zero Trust Requirements

Zero Trust requires organizations to implement controls around block legacy authentication. The ID-02 control provides:

  • A Conditional Access policy blocks legacy authentication protocols (IMAP, POP3, SMTP, older Office clients)
  • No exceptions for legacy protocols except documented service accounts

These measures directly support Zero Trust compliance by ensuring proper identity security in your Microsoft 365 environment.

Implementation for Compliance

To satisfy Zero Trust requirements with this control:

  • **Enable the control** - Use TrueConfig's one-click remediation
  • **Document your implementation** - Record how the control was configured
  • **Maintain evidence** - TrueConfig automatically logs compliance status
  • **Monitor continuously** - Track any deviations from the expected state

Evidence Collection

For Zero Trust audits, you'll need to demonstrate:

  • Current configuration state
  • Historical compliance data
  • Remediation actions taken
  • Continuous monitoring in place

TrueConfig provides all of this evidence through its audit trail and reporting features.

Why This Control Matters for Zero Trust

Legacy protocols like IMAP and POP3 cannot enforce MFA. Attackers specifically target these protocols to bypass your MFA policies. Blocking them closes a major attack vector.

Implementing ID-02 is an important step toward Zero Trust compliance. Combined with TrueConfig's continuous monitoring, you can demonstrate ongoing adherence to Zero Trust requirements.

Ready to achieve Zero Trust compliance?

TrueConfig continuously monitors your Microsoft 365 tenant for compliance with Zero Trust requirements, including this control.