Detect External Mail Forwarding for Legal Services
How legal services organizations should implement EXT-07 for Microsoft 365 security and compliance.
For legal services companies using Microsoft 365, detect external mail forwarding is a security priority. This guide explains how EXT-07 helps legal services organizations protect their identity infrastructure while meeting industry-specific compliance mandates.
Why Legal Services Organizations Need This Control
Legal Services organizations face specific regulatory requirements including soc2, iso27001, cis. The EXT-07 control helps address these requirements by:
- Mailbox forwarding rules to external addresses are identified
- Inbox rules forwarding to external domains are flagged
- No unexpected external forwarding rules exist
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.
Industry-Specific Considerations
When implementing EXT-07 in a legal services environment, consider:
- **Regulatory requirements**: soc2, iso27001, cis may mandate specific configurations
- **Risk tolerance**: Legal Services organizations typically have moderate to low risk tolerance
- **Audit frequency**: Plan for regular compliance reviews
- **Documentation**: Maintain detailed records for regulatory inspections
How to Configure
EXT-07 requires the following configuration:
- Mailbox forwarding rules to external addresses are identified
- Inbox rules forwarding to external domains are flagged
- No unexpected external forwarding rules exist
Requires Exchange admin access or Microsoft Graph Reports API
Follow the steps above in your Microsoft Entra admin center to enable this control.
Legal Compliance Requirements
Legal organizations must comply with these frameworks, all of which address detect external mail forwarding:
Why This Control Matters for Legal
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.
Common threats in legal services:
- • Business email compromise impersonating partners
- • Wire fraud in real estate transactions
- • Targeted attacks on high-profile cases
For legal services organizations, EXT-07 is a key component of a compliant Microsoft 365 security posture. TrueConfig helps you implement and maintain this control while meeting industry-specific requirements.
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