Security checks / Check reference / Identity management
MFA MFA For Guest Not Found
High Severity Microsoft 365 security check in the Identity management domain.
No Conditional Access policy requiring MFA for guest users was found. Guest accounts without MFA are vulnerable to credential compromise Guest accounts without MFA increase supplier risk and facilitate inbound BEC. Siemserva runs this check automatically across your tenant and maps every finding to the compliance frameworks below.
Check summary
What this check verifies
No Conditional Access policy requiring MFA for guest users was found. Guest accounts without MFA are vulnerable to credential compromise
Why it matters
Guest accounts without MFA increase supplier risk and facilitate inbound BEC. Partner and customer trust erodes with each external account takeover
How to fix it
Create CA policy requiring MFA for guest access; test with report-only, 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:
References
Related Identity management checks
Common questions
What does the MFA MFA For Guest Not Found check verify?
No Conditional Access policy requiring MFA for guest users was found. Guest accounts without MFA are vulnerable to credential compromise It is a High Severity check in the Identity management domain, one of the 650+ checks Siemserva runs across Microsoft 365, Intune, Defender, and Entra ID.
How do I fix a MFA MFA For Guest Not Found finding?
Create CA policy requiring MFA for guest access; test with report-only, 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.3.3v2, MS.AAD.3.4v1, MS.AAD.3.5v1, and MCSB controls IM-1, IM-6. 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.