ISO 27001 Compliance
EXT-07Critical

Detect External Mail Forwarding for ISO 27001 Compliance

Learn how EXT-07 helps you meet ISO 27001 requirements for Microsoft 365 and Entra ID security.

Meeting ISO 27001 standards for Microsoft 365 involves implementing controls like EXT-07 (Detect External Mail Forwarding). This guide covers the specific ISO 27001 requirements addressed by this control and how to achieve compliance.

How EXT-07 Addresses ISO 27001 Requirements

ISO 27001 requires organizations to implement controls around detect external mail forwarding. The EXT-07 control provides:

  • Mailbox forwarding rules to external addresses are identified
  • Inbox rules forwarding to external domains are flagged
  • No unexpected external forwarding rules exist

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

Attackers commonly set up mail forwarding rules after compromising accounts. These rules silently copy all emails to external addresses, enabling ongoing data theft even after the initial compromise is remediated.

Implementing EXT-07 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.