Infrastructure & Operations

What Is Certificate Lifecycle Management (CLM)?

Certificate lifecycle management (CLM) is the discipline of controlling every certificate an organization owns through its whole life: discovery and inventory, issuance, deployment, monitoring, renewal, and revocation. As certificate counts run into the thousands and maximum lifetimes shrink toward 47 days, CLM is shifting from spreadsheets to automation platforms — because manual renewal stops being risky and becomes arithmetically impossible.

The lifecycle stages

Discovery (finding certificates you did not know you had — network scans, CT logs, CA inventories), issuance (against policy: approved CAs, key sizes, SAN rules), deployment (getting certificate and key onto the systems that serve them), monitoring (expiry, revocation health, what production actually serves), renewal (ideally automatic, via ACME or agent), and revocation/retirement when keys leave service. Most incidents trace to gaps between stages — renewed but not deployed, deployed but not monitored.

Why automation stopped being optional

Public certificate lifetimes have fallen from three years to 398 days, with the CA/Browser Forum schedule heading to 47 days by 2029 — a 10x increase in renewal events. Meanwhile mTLS, service meshes and IoT multiply certificate counts. The platforms that solve this (Venafi, Keyfactor, AppViewX, and ACME-based automation) pair a certificate inventory with automated issuance and deployment, plus policy enforcement so the automation cannot issue what the CISO would reject.

Where to start

Start with visibility: an inventory of every certificate, its owner, expiry and location — then expiry alerting on everything, then automation of the highest-volume renewal paths. Maturity is measured in a simple question: does a certificate expiry anywhere in the estate require a human to remember anything?

Try it yourself — free tools

Certificate Checker — audit what production actually serves — and subscribe to expiry alerts
CRL Checker — monitor revocation infrastructure as part of the lifecycle

How MI Support IT can help

Certificate lifecycle automation is MI Support IT’s core PKI service: Venafi Zero Touch PKI and TLS Protect implementations, ADCS integration, and the operational runbooks around them. Read about our PKI services or get in touch.