Audit Mailbox Delegation for NIST 800-53 Compliance
Learn how EXT-08 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 EXT-08 (Audit Mailbox Delegation). This guide covers the specific NIST 800-53 requirements addressed by this control and how to achieve compliance.
How EXT-08 Addresses NIST 800-53 Requirements
NIST 800-53 requires organizations to implement controls around audit mailbox delegation. The EXT-08 control provides:
- SendAs permissions on mailboxes are documented
- SendOnBehalf permissions are tracked
- FullAccess mailbox permissions are reviewed
- Delegation changes are monitored
These measures directly support NIST 800-53 compliance by ensuring proper external security in your Microsoft 365 environment.
Implementation for Compliance
To satisfy NIST 800-53 requirements with this control:
- **Enable the control** - Follow the manual configuration steps
- **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
Mailbox delegation enables users to send email as others or access their mailboxes. Unauthorized delegation can be used for impersonation attacks or to access sensitive communications without detection.
Implementing EXT-08 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.