Audit Mailbox Delegation for Legal Services
How legal services organizations should implement EXT-08 for Microsoft 365 security and compliance.
Legal Services organizations face unique security challenges when managing Microsoft 365 environments. The EXT-08 control (Audit Mailbox Delegation) is particularly important for this sector due to soc2 and iso27001 requirements.
Why Legal Services Organizations Need This Control
Legal Services organizations face specific regulatory requirements including soc2, iso27001, cis. The EXT-08 control helps address these requirements by:
- SendAs permissions on mailboxes are documented
- SendOnBehalf permissions are tracked
- FullAccess mailbox permissions are reviewed
- Delegation changes are monitored
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.
Industry-Specific Considerations
When implementing EXT-08 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
Implementation Steps
To implement EXT-08 in your Microsoft 365 environment:
- SendAs permissions on mailboxes are documented
- SendOnBehalf permissions are tracked
- FullAccess mailbox permissions are reviewed
- Delegation changes are monitored
This control requires manual implementation through the Entra admin center.
Legal Compliance Requirements
Legal organizations must comply with these frameworks, all of which address audit mailbox delegation:
Why This Control Matters for Legal
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.
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-08 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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