CUI Compliant
0 NIST 800-171 gaps detected. FedRAMP authorized at High impact level. Approved for CUI handling in DoD environments.
Microsoft 365 GCC High (Exchange Online)
by Microsoft
FedRAMP Status
FedRAMP Authorized
Impact Level
High
Category
Authorized: December 26, 2024
Overview
Microsoft 365 GCC High includes Exchange Online for email and calendaring on dedicated government infrastructure. It is FedRAMP High authorized and supports ITAR and CUI data for defense contractors.
CUI Risk Assessment
FedRAMP authorized at High impact level. Approved for CUI handling in DoD environments.
Deployment & Architecture
Deployment Model: Government Cloud (FedRAMP boundary)
Microsoft 365 GCC High (Exchange Online) operates within a FedRAMP-authorized boundary. CUI can be processed within the authorization scope, but contractors must verify their specific use case falls within the system's security boundary as documented in the SSP.
Configuration Checklist
- 1ISSO: Complete Microsoft GCC High tenant provisioning and verify FedRAMP boundary documentation within 2 weeks
- 2Sysadmin: Configure Azure AD Connect for CAC/PIV integration and establish Conditional Access policies within 3 weeks
- 3ISSO: Implement DLP policies for CUI detection and protection, configure retention policies per contract requirements within 4 weeks
- 4Sysadmin: Migrate mailboxes using PowerShell or approved migration tools, validate data integrity within 6 weeks
- 5ISSO: Configure audit logging, mail flow rules, and external sharing restrictions within 7 weeks
- 6Training Lead: Conduct user training on CUI handling and Outlook security features within 8 weeks
- 7ISSO: Update SSP documentation and authorization boundary diagrams to reflect Exchange Online integration within 10 weeks
- 8Contracts: Validate configuration meets specific contract CUI requirements and document compliance within 12 weeks
Other FedRAMP Authorized Email Tools
Related Compliance Assessments
Frequently Asked Questions
Is Microsoft 365 GCC High email FedRAMP authorized?
Yes. Microsoft 365 GCC High, including Exchange Online, is FedRAMP High authorized and hosted on Azure Government infrastructure.
Can I use Microsoft 365 GCC High email with CUI?
Yes. GCC High Exchange Online is approved for processing and storing CUI and ITAR data, meeting DFARS 252.204-7012 requirements.
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This Microsoft 365 GCC High (Exchange Online) CUI review flags the gaps. The next step is a compliance architecture review where we map your data flows to FedRAMP-authorized alternatives and CMMC-aligned controls.
Schedule architecture reviewRelated: how much CMMC certification costs — DoD’s own priced figures