Cross-Tenant Access Policy Review for Government & Public Sector
How government & public sector organizations should implement EXT-05 for Microsoft 365 security and compliance.
For government & public sector companies using Microsoft 365, cross-tenant access policy review is a security priority. This guide explains how EXT-05 helps government & public sector organizations protect their identity infrastructure while meeting industry-specific compliance mandates.
Why Government & Public Sector Organizations Need This Control
Government & Public Sector organizations face specific regulatory requirements including fedramp, nist-800-53, cis. The EXT-05 control helps address these requirements by:
- Default cross-tenant access policy is not overly permissive
- Partner-specific configurations exist for known collaborators
- Inbound and outbound B2B access is explicitly controlled
Permissive cross-tenant defaults allow any external organization to collaborate with your tenant. Restricting defaults and configuring partner-specific policies ensures only approved organizations can access your resources.
Industry-Specific Considerations
When implementing EXT-05 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
How to Configure
EXT-05 requires the following configuration:
- Default cross-tenant access policy is not overly permissive
- Partner-specific configurations exist for known collaborators
- Inbound and outbound B2B access is explicitly controlled
Can restrict cross-tenant access defaults automatically
With TrueConfig, you can implement this control automatically using our one-click remediation feature.
Government Compliance Requirements
Government organizations must comply with these frameworks, all of which address cross-tenant access policy review:
Why This Control Matters for Government
Permissive cross-tenant defaults allow any external organization to collaborate with your tenant. Restricting defaults and configuring partner-specific policies ensures only approved organizations can access your resources.
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-05 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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