Mani Sri Kumar

Free and open-source approaches to certificate monitoring using PowerShell scripts, certutil queries, cron jobs, and Prometheus exporters — when free is enough and when you've outgrown it.

Public vs internal certificates explained — different CAs, different management approaches, different risks, and why managing one doesn't mean you manage the other.

Champion enablement content with talking points for budget approval, cost justification frameworks, risk framing, one-pager templates, and objection handling for certificate lifecycle management.

A practical PKI explainer for IT operations teams — skip the math, focus on what breaks, how certs work in enterprise, CA hierarchy simplified, and what IT teams interact with daily.

A clear, concise explainer of Certificate Lifecycle Management (CLM) — what it covers, who needs it, how it differs from just having a CA, and why it matters for enterprise security operations.

A real-world story of an F5 load balancer certificate expiry that went undetected for 3 days due to partial failure mode, plus detection strategies and prevention methods.

A deep dive into AD CS template misconfiguration that caused cascading auto-enrollment failure across 500 devices, including troubleshooting with certutil and a prevention checklist.

802.1X onboarding failures, machine certificate provisioning gaps, RADIUS/NPS certificate dependencies, Intune/SCCM enrollment issues, and proven fix patterns for enterprise wireless authentication.

Exchange and Outlook certificate dependencies, real outage scenarios, certificate services in Exchange (SMTP, IIS, POP), troubleshooting steps, and prevention strategies.

A complete methodology for running a certificate risk assessment, including scanning approaches, risk scoring frameworks, report templates, findings categorization, and remediation priorities.