Conditional Access Lockout
Users blocked by CA policy.
Check scope, grant controls, and exclusions.
Security: Prevent $3M–$10M breaches through CA/MFA rapid response
Emergency diagnostics for Conditional Access lockouts, MFA loops, and zero‑trust policy failures. 5–15 minute resolution prevents org-wide authentication failures ($20K–$100K per hour).
Covers P1 CA lockout emergency response (break-glass procedures), MFA authentication loops, device compliance enforcement failures, zero-trust rollout issues, and legacy authentication blocks. Includes safe rollback runbooks that maintain audit compliance and security logging for post-incident review.
Common Problems
MFA Loop / Infinite Challenge
Repeated MFA prompts.
Update Outlook, clear creds, review CA rules.
Zero Trust Exchange Policy
Policies blocking legacy auth or devices.
Add exemptions or modernize clients.
When to Use This Section
Use these guides when users are locked out by conditional access policies, stuck in MFA authentication loops, or blocked by zero-trust policies. Common scenarios include emergency admin account lockout requiring break-glass procedures, MFA registration failures causing infinite redirect loops, location-based policies blocking remote workers, device compliance checks failing for BYOD devices, or session controls preventing legacy protocol access. These diagnostics include safe rollback runbooks to restore access without compromising security posture.
Related Resources
Authentication and sign‑in diagnostics.