A public-health department wants automated phishing-resilience checks without running live social-engineering against residents. Which BAS approach stays inside authorized municipal scope?

A public-health department that wants automated phishing-resilience checks without live social-engineering of residents should use authorized BAS or control-validation scenarios against staff mailboxes and security controls only. Municipal authorization and ethics typically allow testing staff and technical controls under an approved plan; they do not authorize running scenarios in enforcement mode altering live production mail flow, which risks service disruption and exceeds safe BAS control-validation. Keeping BAS inside staff and control scope preserves trust in civic health services while still validating mail filters, EDR, and user-awareness controls for employees.

Why the other options fail by concept: Using authorized BAS or control-validation scenarios against staff mailboxes and security controls plus sampled resident inboxes for coverage still expands testing to live social-engineering of residents outside municipal authorization, violating scope limits and eroding trust in civic health services even to gain broader coverage. Using authorized BAS or control-validation scenarios against staff mailboxes and security controls with credential replay to external lookalike domains still exfiltrates real credentials outside municipal control, turning safe control-validation into unsafe data exposure that violates handling and authorization limits. Using authorized BAS or control-validation scenarios against staff mailboxes and security controls in enforcement mode altering live production mail flow still changes live municipal operations beyond safe-simulation scope, exceeding authorized control-validation and risking outage, misdelivery, and loss of trust.

Exam caveat: even staff-targeted BAS phishing requires written authorization, clear branding/deconfliction rules where policy requires them, and a plan to handle real incident tickets generated by the exercise. Operational check: confirm the test plan names staff mailboxes and security controls as targets, excludes resident/patient populations, routes results to the SOC under change control, and archives approval before any automated phishing-resilience scenario runs.