Microsoft GCC High Migration & Consulting
Expert guidance for transitioning to Microsoft 365 GCC High — the government cloud environment required for handling CUI in DoD contracts.
What Is Microsoft GCC High?
Microsoft 365 GCC High is a government cloud environment designed to meet the stringent security requirements of the Department of Defense and organizations handling Controlled Unclassified Information (CUI). It operates in physically separated data centers within the United States, staffed exclusively by screened U.S. persons.
Unlike commercial Microsoft 365 or even GCC, GCC High provides the FedRAMP High baseline controls and DFARS compliance posture required for CMMC Level 2 certification in many scenarios.
- FedRAMP High authorized environment
- Physically separated U.S.-only data centers
- Screened U.S. person access only
- Supports ITAR and EAR controlled data
- Required for many CMMC Level 2 implementations
Why GCC High Migration Is Complex
Migrating to GCC High is not a simple tenant-to-tenant move. It requires creating a new tenant from scratch, re-provisioning all users, migrating data with specialized tools, and reconfiguring every security policy and integration.
Organizations face licensing changes, application compatibility issues, and the need to maintain operations during a parallel-run period. Without experienced guidance, migrations frequently stall or introduce compliance gaps.
- No direct tenant-to-tenant migration path
- All users and data must be re-provisioned
- Third-party app compatibility must be validated
- Conditional Access and DLP policies require reconfiguration
- Parallel operation period needed for business continuity
Applicable Standards
Deliverables
Tangible artifacts and documentation you receive throughout the engagement.
Migration Readiness Assessment
Current environment analysis and GCC High gap identification
Migration Plan
Phased migration timeline with rollback procedures
Identity Architecture
Azure AD configuration, Conditional Access, and MFA design
Data Migration Report
Complete audit of migrated data with integrity validation
Security Configuration Baseline
Hardened GCC High security settings documentation
Post-Migration Validation
Compliance verification against NIST 800-171 controls
Engagement Workflow
A proven, repeatable process from initial scoping through ongoing support.
Assessment
Evaluate current environment and licensing requirements
Planning
Design migration architecture and timeline
Provisioning
Stand up GCC High tenant and configure identity
Migration
Execute phased data and user migration
Validation
Verify compliance posture and operational readiness
Planning a GCC High migration?
Schedule a consultation to assess your environment and build a migration roadmap.
Schedule Consultation