Operating and Maintaining a Privileged Access Workstation

Deploying a Privileged Access Workstation is a significant milestone.

It’s also where many organisations stop.

The workstation is deployed, hardened and handed to the administrator. The project is signed off, documentation is completed and attention moves elsewhere.

Unfortunately, that’s also when the real work begins.

Like every security control, a Privileged Access Workstation requires ongoing management to ensure it continues providing the level of assurance it was designed to deliver.

Operating systems evolve.

Threats change.

Administrators change roles.

Applications are updated.

Security baselines improve.

Without continuous governance, even the most carefully designed administrative environment will gradually drift away from its original purpose.

A Privileged Access Workstation isn’t a project.

It’s an operational service.

Configuration Drift Is Inevitable

One of the biggest challenges facing any privileged administrative environment is configuration drift.

Nobody deliberately sets out to weaken a PAW.

It happens gradually.

An administrator installs Microsoft Teams because they need to join a meeting.

Someone adds Outlook to quickly check an email.

A browser extension is installed to make administration easier.

Development tools appear.

Temporary exceptions become permanent.

Over time the dedicated administrative environment slowly begins to resemble every other corporate device.

The attack surface increases.

The trust boundary weakens.

Eventually the workstation may no longer provide the level of assurance it once did.

Configuration drift isn’t unusual.

Failing to detect it is.

Keep the Build Standard Under Review

A Privileged Access Workstation should never be considered a static build.

Security recommendations evolve constantly.

New Windows security features become available.

Microsoft Defender capabilities improve.

Microsoft Intune introduces additional controls.

Your build standard should be reviewed regularly to ensure it continues reflecting current best practice and organisational requirements.

Hardening isn’t a one-time activity.

It’s a continuous improvement process.

Patch Early, Patch Often

Administrative workstations should always receive security updates promptly.

That includes:

• Windows security updates
• Microsoft Defender platform updates
• Browser updates
• Firmware updates
• UEFI updates
• TPM firmware where applicable
• Approved application updates

Privileged identities represent high-value targets.

Reducing the window of exposure to known vulnerabilities should be a priority.

Monitor Device Health

Hardening alone isn’t enough.

Organisations also need visibility into the health of their administrative environments.

Microsoft Intune and Microsoft Defender provide valuable insight into:

• Device compliance
• Endpoint health
• Security recommendations
• Exposure score
• Vulnerabilities
• Active alerts
• Configuration drift

Monitoring should be proactive rather than reactive.

The objective is to identify changes before they become security incidents.

Identity Security Doesn’t Stop

The workstation may be dedicated, but identity remains your primary security boundary.

Regularly review:

• Administrative role assignments
• Eligible versus permanent assignments
• Privileged Identity Management configuration
• Authentication Strengths
• Passkey registration
• FIDO2 Security Keys
• Conditional Access policies
• Emergency Access Accounts

A secure workstation doesn’t compensate for poor identity governance.

Both must work together.

Review Administrative Access

Administrative access naturally changes over time.

People move teams.

Projects end.

Consultants leave.

Support contracts expire.

Administrative permissions should be reviewed regularly to confirm they’re still required.

If an identity no longer requires privileged access, the corresponding administrative environment should also be reviewed.

The principle of least privilege applies to workstations as much as identities.

Prepare for Device Replacement

Every workstation has a lifecycle.

Hardware eventually fails.

Devices reach end of support.

Administrators receive new equipment.

Having a documented replacement process ensures administrative assurance is maintained throughout the lifecycle.

Replacement should include:

• Secure build deployment
• Identity verification
• Migration of approved administrative tools
• Secure disposal or reimaging of retired devices
• Validation before returning the workstation to service

Replacing a PAW should be routine rather than disruptive.

Plan for Security Incidents

Every organisation should have a documented response plan for a potentially compromised administrative workstation.

Questions worth considering include:

• How is the device isolated?
• How are privileged sessions terminated?
• Should authentication methods be reset?
• Do privileged roles need to be revoked?
• When should the workstation be rebuilt?
• What forensic evidence should be preserved?

Having these decisions documented before an incident occurs significantly improves response times.

Governance Is Essential

Technology alone won’t maintain a Privileged Access Workstation.

Ownership is equally important.

Someone should be responsible for:

• Build standards
• Security baselines
• Hardening policies
• Device lifecycle
• Exception management
• Compliance reviews
• Operational documentation

When ownership isn’t clear, standards gradually become inconsistent.

Good governance ensures every administrative environment continues providing the assurance it was designed to deliver.

Regular Assurance Reviews

Perhaps the most important operational activity is simply asking a few questions on a regular basis.

Is this workstation still required?

Does it still meet the build standard?

Has the attack surface increased?

Are all installed applications still justified?

Does the administrator still require the same level of assurance?

Has organisational risk changed?

Technology evolves.

Business requirements evolve.

Administrative environments should evolve alongside them.

Key Takeaways

A Privileged Access Workstation doesn’t remain secure simply because it was deployed correctly.

Its level of assurance depends on how well it’s operated, monitored and maintained over time.

Configuration drift, changing business requirements and evolving threats all influence the security of the administrative environment.

Treating a PAW as an operational service rather than a one-off project helps ensure it continues protecting privileged identities long after deployment.

What’s Next?

Throughout this series we’ve explored Privileged Access Workstations from multiple perspectives.

We’ve looked at why they exist, when they’re justified, physical and virtual deployment models, choosing the right administrative environment and how to harden and operate them effectively.

In the final article we’ll bring everything together.

We’ll explore how Trust Levels, authentication assurance, Privileged Identity Management, Conditional Access, administrative environments and governance combine to form a modern privileged access strategy that can evolve alongside your organisation.

Because a Privileged Access Workstation is never the objective.

Protecting privileged identities is.