Starting point: DCs should not be print targets

In many environments, the Print Spooler runs on Domain Controllers simply because it’s there. Operationally, almost nobody prints from a DC – but security-wise it still matters: the Spooler is an extra service with its own failure and attack surface. On Tier-0 systems, that’s unnecessary risk.

If you run AD hardening as an actual project (not as a checkbox exercise), this is a good control to implement early: clear benefit, low complexity – as long as you treat exceptions properly.

Target state: keep Tier 0 lean

Pragmatic target state:

  • On all Domain Controllers, the Spooler service is stopped and disabled.
  • DCs do not carry the Print Server role, queues, or ad-hoc printer installs.
  • If exceptions exist: documented, time-bound, technically enforced (not “silently tolerated”).
  • Operations: a recurring check (monitoring/audit) verifies the state continuously.

Implementation: enforce the state, don’t “stop it once”

1) Verify dependencies first

Before rolling this out via GPO:

  • Is any DC being used as a print server (it shouldn’t be)?
  • Are admins managing printers “locally” on DCs out of habit?
  • Any third-party agent that expects Spooler to exist (rare, but possible)?

Quick, non-invasive PowerShell check (on DCs or via remoting):

Get-Service -Name Spooler | Select-Object Status, StartType, Name, DisplayName

2) GPO: disable the service on DCs

The robust approach is a GPO linked to the Domain Controllers OU (or your dedicated DC OU structure).

Option A (classic): System Services in the GPO

  • Computer Configuration → Policies → Windows Settings → Security Settings → System Services → Print Spooler
  • Startup Mode: Disabled
  • Service Permissions: don’t widen them unless you explicitly need it

Option B (pragmatic if you already use GPP): Group Policy Preferences Services

  • Computer Configuration → Preferences → Control Panel Settings → Services
  • Service name: Spooler
  • Action: Update
  • Startup: Disabled
  • Service action: Stop service

Key point: for Tier 0, “do it manually” is not a control. You want an enforced, auditable configuration.

3) Treat exceptions as a first-class artifact

If you truly need a temporary exception (for example during a migration window):

  • Model exceptions OU-based (e.g., OU=DC-Exceptions), not as fragile ad-hoc filtering.
  • Set an expiry date and an owner.
  • Implement a control so exceptions stay visible (dashboard, recurring review, change record).

Operations: make it auditable

Minimum operational standard:

  • A recurring compliance check that verifies on all DCs:
  • Spooler is Stopped
  • StartType is Disabled
  • Alert if any DC drifts from the baseline.

If you already run Tier-0 baseline reporting, include this control as a measured item.

Pros (explicit)

  • Fewer services on Tier 0 → less attack surface and fewer “surprise” dependencies.
  • Drift becomes measurable: if someone re-enables Spooler, it’s a clear policy violation.
  • Clear separation of roles (DC vs. workload roles), which makes later hardening easier.

Cons and limits (explicit)

  • If a DC was effectively used as a print server (it shouldn’t), there will be operational impact – but that’s an architecture issue you need to fix anyway.
  • Some admin workflows done “out of habit” on DCs must move (e.g., printer management).
  • This does not replace other print-related controls: Point-and-Print hardening, driver governance, admin workflow hygiene, and segmentation remain separate workstreams.

Common pitfalls

  • GPO scope: the policy does not actually apply to all DCs (OU inconsistency, wrong link, inheritance blocks, WMI filters).
  • Stopped but not disabled: after a reboot the service is back.
  • Exceptions without governance: a “temporary” exception DC stays excluded forever.
  • Role sprawl: a DC also hosts other roles – Spooler is often the first signal the overall target state is missing.

Project checklist (for a hardening rollout)

  1. DC inventory: list of DCs, sites, roles, OU placement.
  2. Baseline check: capture Spooler status/start type per DC.
  3. Write down the target state: “No Print Spooler on Tier 0” + exception rule.
  4. Pilot: 1–2 DCs per site (if applicable), plan a maintenance window.
  5. Rollout: link GPO to all DCs, align reboot/maintenance planning.
  6. Operational check: compliance query/script + alerting on drift.
  7. Exceptions: documented, time-bound, owned, and reviewed regularly.