Service
Microsoft GCC High Migration
Tenant strategy, content migration, identity cutover, and hardening for Microsoft 365 GCC High. Built around CUI handling, DFARS 252.204-7012, and the operational realities of small DIB shops.
What it covers
A GCC High migration that holds up under assessment
Every shop we talk to underestimates the operational lift. Different URLs, different mobile apps, different connectors, different licensing constraints. Getting it right means planning before procurement, not after.
Eligibility verification and procurement
Confirming your organization qualifies for GCC High, navigating Microsoft's sponsorship process, and procuring the right license SKUs. The eligibility step alone catches a lot of shops off-guard.
Tenant strategy and design
Greenfield tenant build, domain strategy, and decisions about which workloads land in GCC High versus stay commercial. Not every workload belongs in GCC High, and the boundary matters for cost and assessment scope.
Content and mailbox migration
Migration of mailboxes, OneDrive content, SharePoint sites, and Teams chats from your source environment (commercial M365, GCC, on-premises Exchange) into the GCC High tenant with chain-of-custody documentation.
Identity cutover
Entra ID setup in GCC High, hybrid identity decisions, Conditional Access policies, and the user cutover plan. We coordinate the change so people keep working through it.
Tenant hardening
Post-migration hardening against the NIST SP 800-171 r2 control set including: Defender baselines, MDM and Intune policies, Baseline Purview DLP, and the configuration moving you towards being assessment-ready.
How a GCC High migration runs
1. Discovery and eligibility
A working call about your contract obligations, current environment, and timeline. We confirm GCC High eligibility and whether the move is actually warranted (sometimes commercial M365 plus the right configuration is the right answer).
2. Design and procurement
Tenant architecture, license selection, and procurement through an authorized GCC High partner. Migration plan with cutover sequencing and rollback criteria.
3. Pilot migration
A small user group migrates first. We validate the workflow, catch the surprises, and refine the runbook before production cutover.
4. Production migration and cutover
Production migration in waves with on-the-ground support during cutover windows. Real humans available for the questions that always come up.
5. Hardening and handoff
Post-migration security baseline applied. Documentation handed over. Optional handoff into ongoing M365 Security & Compliance Operations.
GCC High tenant, ready for production
Planning a GCC High move?
We will walk you through the eligibility, the realistic timeline, and the operational impact before you sign a procurement.