Security checks / Check reference / Conditional Access
Conditional Access Browser O365 Missing MFA
High Severity Microsoft 365 security check in the Conditional Access domain.
Browser access to O365 not protected by MFA for this user. Detected via What-If Browser access to Office 365 without MFA is one of the most common attack surfaces Password spray and phishing directly target this path Siemserva runs this check automatically across your tenant and maps every finding to the compliance frameworks below.
Check summary
What this check verifies
Browser access to O365 not protected by MFA for this user. Detected via What-If
Why it matters
Browser access to Office 365 without MFA is one of the most common attack surfaces Password spray and phishing directly target this path
How to fix it
Create a CA policy requiring MFA for this scenario; test with report-only first
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 Conditional Access checks
Common questions
What does the Conditional Access Browser O365 Missing MFA check verify?
Browser access to O365 not protected by MFA for this user. Detected via What-If It is a High 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 Browser O365 Missing MFA finding?
Create a CA policy requiring MFA for this scenario; test with report-only first 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 control 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.