Security checks / Check reference / Conditional Access

Conditional Access What If Missing Legacy App Policy

Medium Severity Microsoft 365 security check in the Conditional Access domain.

What-If found no policy blocking legacy authentication for this user Legacy clients are not represented in evaluation; hidden basic-auth routes persist and remain exploitable without visibility Siemserva runs this check automatically across your tenant and maps every finding to the compliance frameworks below.

Medium SeverityConditional AccessSCuBA MS.AAD.1.1v1

Check summary

Severity
Medium
Domain
Conditional Access
Rank in domain
3
Frameworks
6

What this check verifies

What-If found no policy blocking legacy authentication for this user

Why it matters

Legacy clients are not represented in evaluation; hidden basic-auth routes persist and remain exploitable without visibility

How to fix it

Create CA policy for this scenario; deploy in report-only, validate, then enforce

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:

SCuBAMCSBNISTSOC2CISHIPAASCuBA MS.AAD.1.1v1SCuBA MS.AAD.2.1v1SCuBA MS.AAD.2.2v1SCuBA MS.AAD.2.3v1SCuBA MS.AAD.3.1v1SCuBA MS.AAD.3.2v1MCSB IM-6MCSB LT-3

References

learn.microsoft.com: /entra/identity/conditional-access/policy-block-au...learn.microsoft.com: /entra/identity/conditional-access/what-if-tool...learn.microsoft.com: /entra/identity/conditional-access/overview...www.cisa.gov: /sites/default/files/2023-12/Azure%20Active%20Dire...

Related Conditional Access checks

Conditional Access Admin Portal Missing MFAConditional Access Block Legacy Exchange Active S...Conditional Access Block Legacy Exchange Active S...Conditional Access Block Requested PlatformsConditional Access Break Glass Account Covered By...Conditional Access Break Glass Account ExcludedConditional Access Browser O365 Missing MFAConditional Access Coverage Gap

Common questions

What does the Conditional Access What If Missing Legacy App Policy check verify?

What-If found no policy blocking legacy authentication for this user It is a Medium Severity check in the Conditional Access domain, one of the 650+ checks Siemserva runs across Microsoft 365, Intune, Defender, and Entra ID.

How do I fix a Conditional Access What If Missing Legacy App Policy finding?

Create CA policy for this scenario; deploy in report-only, validate, then enforce 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, including SCuBA policy MS.AAD.1.1v1, MS.AAD.2.1v1, MS.AAD.2.2v1, MS.AAD.2.3v1, MS.AAD.3.1v1, MS.AAD.3.2v1, and MCSB controls IM-6, LT-3. 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, Conditional Access What If Missing... 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
Conditional Access What If Missing... across 2 tenants, ranked by Severity
23
FAILING
87
PASSING
41
OTHER FINDINGS
CHECKSEVERITYSTATUSFINDINGS
Conditional Access What If Missing...MediumFAILING23
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
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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.