Audit Mailbox Delegation for Government & Public Sector
How government & public sector organizations should implement EXT-08 for Microsoft 365 security and compliance.
Government & Public Sector 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 fedramp and nist-800-53 requirements.
Why Government & Public Sector Organizations Need This Control
Government & Public Sector organizations face specific regulatory requirements including fedramp, nist-800-53, 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 government & public sector environment, consider:
- **Regulatory requirements**: fedramp, nist-800-53, cis may mandate specific configurations
- **Risk tolerance**: Government & Public Sector 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.
Government Compliance Requirements
Government organizations must comply with these frameworks, all of which address audit mailbox delegation:
Why This Control Matters for Government
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 government & public sector:
- • Nation-state espionage campaigns
- • Ransomware targeting critical services
- • Insider threats from privileged users
For government & public sector 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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