NIST 800-53 Compliance
ID-02High

Block Legacy Authentication for NIST 800-53 Compliance

Learn how ID-02 helps you meet NIST 800-53 requirements for Microsoft 365 and Entra ID security.

Meeting NIST 800-53 standards for Microsoft 365 involves implementing controls like ID-02 (Block Legacy Authentication). This guide covers the specific NIST 800-53 requirements addressed by this control and how to achieve compliance.

How ID-02 Addresses NIST 800-53 Requirements

NIST 800-53 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 NIST 800-53 compliance by ensuring proper identity security in your Microsoft 365 environment.

Implementation for Compliance

To satisfy NIST 800-53 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 NIST 800-53 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 NIST 800-53

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 NIST 800-53 compliance. Combined with TrueConfig's continuous monitoring, you can demonstrate ongoing adherence to NIST 800-53 requirements.

Ready to achieve NIST 800-53 compliance?

TrueConfig continuously monitors your Microsoft 365 tenant for compliance with NIST 800-53 requirements, including this control.