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AD Expert

Forests, Kerberos internals, advanced GPO, and hardening Active Directory.

What you'll actually learn

This track picks up where a basic Active Directory setup stops being enough — multiple domains under one forest, the actual Kerberos ticket exchange happening behind every "it just works" login, and the GPO settings that decide whether a compromised workstation can pivot into a domain controller. Instead of clicking through wizards, you work through why a trust relationship can be abused, why ticket lifetimes matter, and what a real hardening baseline looks like.

What you'll be able to do

You'll be handed an AD environment with a plausible but dangerous misconfiguration — an overly trusting cross-forest relationship, a GPO that leaves an attack path open — and trace exactly how it could be exploited, then close it the way a real security-conscious admin would, not just by following a checklist someone else wrote.

Syllabus

1Kerberos in Active Directory: The Ticket Dance, In Fullexpert~11 min
2Real AD Attack Techniques: Kerberoasting, Pass-the-Hash, and DCSyncexpert~11 min
3Hardening AD: The Tiering Model, Protected Users, and LAPSexpert~10 min
4Least Privilege in Practice: Delegation, gMSAs, and Constrained Delegationexpert~10 min
5AD Expert Synthesis: Think Like an Attacker, Defend Like an Architectexpert~12 min

Frequently asked

How long does AD Expert take to complete?

Roughly 1 hour across 5 hands-on quests — you can go at your own pace and pick up exactly where you left off.

What do I need to know before starting AD Expert?

You should be comfortable with Security: The Foundations, Windows Server & Active Directory first — the skill tree unlocks AD Expert once you've cleared those.

Is AD Expert free to learn?

Yes — AD Expert is fully available on the free tier, starting with a free first quest and no payment method required to sign up. Plus and Elite remove pacing limits but don't gate any of the AD Expert curriculum behind a paywall.

Start this skill for free

Create a free account and begin your first quest — no card required.

Start free