Security checks / Check reference / Authentication methods

Auth FIDO2 Key Restrictions Not Enforced

Medium Severity Microsoft 365 security check in the Authentication methods domain.

FIDO2 key restrictions are not enforced Any security key can be registered regardless of make or model Without AAGUID restrictions, users can register unvetted or cloned keys; attestation trust degrades Siemserva runs this check automatically across your tenant and maps every finding to the compliance frameworks below.

Medium SeverityAuthentication methods

Check summary

Severity
Medium
Domain
Authentication methods
Rank in domain
3
Frameworks
6

What this check verifies

FIDO2 key restrictions are not enforced Any security key can be registered regardless of make or model

Why it matters

Without AAGUID restrictions, users can register unvetted or cloned keys; attestation trust degrades

How to fix it

Enable FIDO2 key restrictions and maintain an AAGUID allowlist of approved hardware

Siemserva flags every tenant where this check fails and, with Senserva Trustworthy AI remediation, can propose a validated fix you approve before it applies.

Ask your own AI about this check

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

Compliance framework mappings

Findings from this check serve as evidence for:

SCuBAMCSBNISTSOC2CISHIPAAMCSB IM-6MCSB IM-7

References

learn.microsoft.com: /security/benchmark/azure/mcsb-identity-management...

Related Authentication methods checks

Auth Allowed Authentication Methods DisabledAuth Authentication Method Excluded User TargetAuth Authentication Method Included User Target R...Auth Authentication Method Included User Target R...Auth FIDO2 Authentication Method In Use But Not A...Auth FIDO2 Passwordless Enabled But Not GovernedAuth Group Authentication Method Excluded Group T...Auth Group Authentication Method Included Group T...

Common questions

What does the Auth FIDO2 Key Restrictions Not Enforced check verify?

FIDO2 key restrictions are not enforced Any security key can be registered regardless of make or model It is a Medium Severity check in the Authentication methods domain, one of the 650+ checks Siemserva runs across Microsoft 365, Intune, Defender, and Entra ID.

How do I fix a Auth FIDO2 Key Restrictions Not Enforced finding?

Enable FIDO2 key restrictions and maintain an AAGUID allowlist of approved hardware Siemserva ranks the finding by Severity and, with Senserva Trustworthy AI, can propose a validated, approve-before-apply configuration fix.

Which compliance frameworks does this check evidence?

Findings from this check map to SCuBA, MCSB, NIST, SOC2, CIS, HIPAA, and MCSB controls IM-6, IM-7. That mapping is what turns a scan finding into audit evidence.

Can I ask my own AI about this check?

Yes. This page includes a free copy-paste AI prompt carrying the check's facts: what it verifies, the risk, the remediation, and the framework mappings. Paste it into Claude, ChatGPT, or Copilot; cite-worthy detail without giving an AI access to your tenant.

All 672 checks with severities and mappings: the Microsoft 365 security checks catalog.

Sponsored by Senserva

Siemserva by Senserva runs this check, Auth FIDO2 Key Restrictions Not Enforced for example, across your own tenant: which tenants pass, which fail, ranked by Severity with the evidence attached.

  • 650+ Microsoft 365, Intune, Defender, and Entra ID checks in one scan
  • Findings mapped to SCuBA, CIS, NIST, HIPAA, SOC 2, and MCSB for audit-ready evidence
  • Senserva Trustworthy AI driven configuration remediation: validated, approve-before-apply fixes
  • Optional AI Enhanced Reporting: plain-language summaries and recommended next steps written into your reports
  • Multi-tenant and MSP practices, with bulk tenant audits and client-ready reporting
Compliance Status Report
Auth FIDO2 Key Restrictions Not Enforced across 2 tenants, ranked by Severity
23
FAILING
87
PASSING
41
OTHER FINDINGS
CHECKSEVERITYSTATUSFINDINGS
Auth FIDO2 Key Restrictions Not EnforcedMediumFAILING23
MFA for all usersCritical-11
Legacy authentication blockedHigh-6
Estimated report, sample data for illustration
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Microsoft 365 compliance and audit evidence
See this check's evidence trail, click to play

How findings become audit evidence, in two minutes. Watch page · All videos.

Reference: the compliance and audit guide, and the full checks catalog.
Data notice: check definitions describe what Siemserva verifies and are provided as is, for informational purposes only, without warranty of any kind. Framework mappings are informational and do not constitute compliance advice; confirm requirements with your assessor. All use of this data is subject to the Senserva EULA.