ISO 27001 Compliance
EXT-08Medium

Audit Mailbox Delegation for ISO 27001 Compliance

Learn how EXT-08 helps you meet ISO 27001 requirements for Microsoft 365 and Entra ID security.

Organizations pursuing ISO 27001 compliance need to address audit mailbox delegation as part of their security program. The EXT-08 control maps directly to ISO 27001 requirements, helping demonstrate compliance while strengthening your security posture.

How EXT-08 Addresses ISO 27001 Requirements

ISO 27001 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 ISO 27001 compliance by ensuring proper external security in your Microsoft 365 environment.

Implementation for Compliance

To satisfy ISO 27001 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 ISO 27001 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 ISO 27001

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 ISO 27001 compliance. Combined with TrueConfig's continuous monitoring, you can demonstrate ongoing adherence to ISO 27001 requirements.

Ready to achieve ISO 27001 compliance?

TrueConfig continuously monitors your Microsoft 365 tenant for compliance with ISO 27001 requirements, including this control.