Not CUI Compliant
6 NIST 800-171 gaps detected. Commercial M365 is explicitly non-compliant for CUI. No longer recognized as FedRAMP equivalent under the 48 CFR final rule. Data may reside outside the US. Any CUI in M365 Commercial prevents CMMC certification.
Microsoft 365 (Commercial)
by Microsoft
FedRAMP Status
Not FedRAMP Authorized
Impact Level
N/A
Category
Overview
Commercial Microsoft 365 is the standard version used by most businesses worldwide. It is explicitly non-compliant for CUI handling — data may reside outside the US, support is provided by non-US persons, and it holds no FedRAMP authorization. Thousands of small defense contractors still use commercial M365 for email, SharePoint, and Teams, creating their largest compliance gap.
CUI Risk Assessment
Commercial M365 is explicitly non-compliant for CUI. No longer recognized as FedRAMP equivalent under the 48 CFR final rule. Data may reside outside the US. Any CUI in M365 Commercial prevents CMMC certification.
Deployment & Architecture
Deployment Model: Cloud SaaS (vendor-hosted)
Microsoft 365 (Commercial) has no FedRAMP authorization on record. DFARS 252.204-7012(b)(2)(ii)(D) requires an external cloud service provider to meet security requirements equivalent to the FedRAMP Moderate baseline — an authorization is the straightforward way to show that, but it is not the only one. Without one, the burden is on you to establish, document, and defend equivalency, and to meet the clause's incident-reporting and media-preservation obligations. Most contractors find an authorized alternative cheaper than carrying that burden.
Migration Checklist
- 1ISSO: Conduct comprehensive CUI inventory across all M365 Commercial workloads (Exchange, SharePoint, OneDrive, Teams) within 30 days
- 2Contracts: Negotiate M365 GCC High licensing with Microsoft or authorized reseller within 45 days
- 3ISSO: Document data export procedures and execute content migration using Microsoft FastTrack services over 60-90 days
- 4Sysadmin: Configure M365 GCC High tenant with NIST 800-171 baseline settings and conditional access policies within 14 days
- 5ISSO: Update System Security Plan to remove M365 Commercial and add GCC High as authorized system component
- 6Sysadmin: Implement user provisioning and execute controlled user migration in phases over 30 days
- 7ISSO: Conduct post-migration compliance validation and update authorization boundary diagrams within 15 days
- 8ISSO: Schedule follow-up CMMC readiness assessment to validate M365 GCC High compliance posture
NIST 800-171 Violations
Using Microsoft 365 (Commercial) for CUI without FedRAMP authorization may violate these NIST 800-171 controls:
Need a CUI-Compliant Alternative?
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FedRAMP Compliant Alternatives
Related Compliance Assessments
Frequently Asked Questions
Can I use regular Microsoft 365 with CUI?
No. Commercial Microsoft 365 is not FedRAMP authorized and is explicitly non-compliant for CUI. You need Microsoft 365 GCC High for DoD CUI workloads.
Is Microsoft 365 commercial FedRAMP equivalent?
No. The 48 CFR final rule eliminated FedRAMP equivalency claims for commercial cloud products. Commercial M365 is not recognized as FedRAMP equivalent.
What happens if I have CUI in commercial M365?
You are non-compliant with DFARS 252.204-7012 and will fail a CMMC assessment. You must migrate CUI workloads to GCC High or an alternative like PreVeil.
Run a Full Tech Stack Audit
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Launch CUI AuditorGet a defensible CUI architecture
This Microsoft 365 (Commercial) 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