Microsoft 365 GCC
by Microsoft
FedRAMP Status
FedRAMP Authorized
Impact Level
Moderate
Category
Authorized: December 17, 2014 | Sponsor: Department of Justice
Overview
Microsoft 365 GCC is FedRAMP Moderate authorized and runs on government community cloud infrastructure. However, it shares the commercial backbone and support personnel may not be US citizens. For DoD CUI, ITAR, or export-controlled data, GCC High is required. GCC is the most common compliance mistake in the defense industrial base.
CUI Risk Assessment
FedRAMP Moderate only — NOT sufficient for ITAR or export-controlled CUI. Data may be processed by non-US persons. Many contractors use GCC thinking it covers CUI but GCC High is required for DoD CUI contracts.
NIST 800-171 Violations
Using Microsoft 365 GCC for CUI without FedRAMP authorization may violate these NIST 800-171 controls:
FedRAMP Compliant Alternatives
Frequently Asked Questions
Is Microsoft 365 GCC sufficient for CUI?
It depends. GCC meets FedRAMP Moderate which may cover some non-export-controlled CUI for civilian agencies. For DoD contracts with DFARS 7012, ITAR, or export-controlled CUI, GCC High is required.
What is the difference between GCC and GCC High?
GCC High runs on physically isolated Azure Government infrastructure with US-person-only support, FedRAMP High authorization, and ITAR compliance. GCC shares some commercial infrastructure and is FedRAMP Moderate only.
Why do so many contractors get this wrong?
The naming is confusing. "GCC" sounds government-compliant, and Microsoft markets it for government use. But the critical difference is GCC = Moderate, GCC High = High. Most DoD CUI contracts require High.
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