TenuVaultDesktopPractical guide
NIST 800-171 Intune mapping
NIST 800-171 Intune mapping connects selected device configuration evidence to requirements in the chosen revision. Use TenuVault to review that mapping, then add device and organizational evidence for your CMMC preparation.
Which revision and CUI systems should I include?
Before collecting evidence, agree which systems handle controlled unclassified information and which revision your contract or assessment requires. NIST SP 800-171 addresses protecting that information in nonfederal systems and organizations. A tenant-wide policy inventory alone does not establish that system boundary.
TenuVault offers separate native comparisons for SP 800-171 Rev. 2 and Rev. 3. Choose the revision required by your engagement, rather than assuming the newest mapping replaces the applicable requirements. For CMMC preparation, confirm the required revision with your assessment lead and contract documentation before naming an export as evidence.
Which endpoint settings support an 800-171 review?
Work from the CUI system boundary, not a convenient device group. Ask the system owner which managed endpoints store, process or transmit CUI, then check that population against Intune assignments. NIST SP 800-171 includes Access Control, Configuration Management, Identification and Authentication, and System and Communications Protection families. These give you places to start an endpoint review, not a statement that every requirement can be checked in Intune.
For Windows endpoints, inspect disk encryption policies for the intended BitLocker configuration and account protection policies for local administrative access settings. Look at configuration profiles that establish the approved device settings, and investigate conflicting values before collecting a screenshot. When authentication is part of the request, examine the relevant Microsoft Entra Conditional Access policies and their user and resource scope.
Use device configuration status to follow up on failed or pending delivery to the CUI population. An assigned encryption setting is not proof of every cryptographic requirement in the publication. Intune also cannot establish your personnel, physical protection or incident response processes from those device policies. Keep those questions with the people responsible for the CUI system.
How do I compare the required 800-171 revision?
1. In TenuVault, choose the tenant holding the CUI endpoint policies and open Frameworks. Select NIST SP 800-171 Rev. 2 or Rev. 3 to match the requirement you agreed with the system owner.
2. Under Platforms in scope, include the operating systems used inside that boundary. Select Conditional Access if its authentication policies belong in this review, then click Compare settings.
3. Inspect a missing or different capability through Setting-by-setting evidence. Check the observed policy and assignment details against your CUI device list; an unassigned profile cannot provide a matching capability.
4. Read Collection coverage and limitations before exporting the comparison. Keep the selected revision beside the PDF, CSV or JSON so the CMMC preparation team can tell which requirement set you examined.
Community includes the native 800-171 comparison and its PDF, CSV and JSON exports, so the first revision review does not require a paid plan.
Where does NIST 800-171 Intune mapping need follow-up?
Build an evidence register with the requirement identifier, mapped capability, observed policy, assigned groups and supporting device checks. For an access-related finding, ask whether the intended users and devices are actually inside the boundary. For a configuration finding, check whether exceptions are approved and recorded. Assign organizational requirements to their owners rather than marking them complete because a device policy matches.
For example, a matching device policy assigned to a broad staff group may still leave a contractor laptop outside management. Record the affected CUI endpoints and ask the system owner to resolve that boundary issue. Do not close it by creating another policy with the same setting.
After an approved correction, repeat the chosen revision with unchanged platform scope. Preserve the earlier result if the ruleset changed, because the two runs may no longer support a direct comparison. Explain whether the improvement came from new configuration, corrected assignments or repaired collection access.
Can I test the CUI configuration review first?
Download TenuVault and compare one agreed CUI endpoint population against the applicable 800-171 revision. Walk a single finding back to its assigned policy before expanding the review.
Read the technical guides
Product scope reviewed . Check your installed release and the current plan table before using a workflow.
Frequently asked questions
Does the mapping produce a CMMC assessment score?+
No. Configuration matches are evidence for review. They are not a CMMC assessment result or a substitute for the applicable assessment process.
Should I select Rev. 2 or Rev. 3?+
Select the revision required for your engagement. TenuVault lists both separately; retain the selected revision with every export.
Can an unassigned policy satisfy a mapped capability?+
Unassigned policy evidence remains visible, but it cannot count as a native comparison match. Review targeting and device results separately.