10 – Microsoft Windows Server 2025 Administration Fundamentals: Exploring the Operating System Through PowerShell

Windows Server | PowerShell | Infrastructure Administration | Identity Foundations | Enterprise Security

Overview

After deploying and validating my Windows Server 2025 laboratory environment, the next step was to move beyond installation and begin administering the operating system itself.

This laboratory focused on using PowerShell to explore the core components that underpin every Microsoft enterprise environment. Rather than configuring new server roles, the objective was to understand how Windows Server operates before introducing services such as Active Directory Domain Services.

Developing these administration skills is essential because enterprise identity platforms do not exist in isolation. Authentication, authorisation, monitoring, and security all depend upon a stable and well-managed Windows Server infrastructure.

This lab represents the transition from validating an operating system to understanding how administrators interact with it on a daily basis.

Objective

The objectives of this laboratory were to:

• Develop practical Windows Server administration skills using PowerShell.
• Inspect running processes and Windows services.
• Validate network configuration and connectivity.
• Review local users and security groups.
• Examine Windows Event Logs.
• Verify Windows Firewall configuration.
• Assess readiness for future Active Directory deployment.
• Continue building an evidence-based administration methodology.

Unlike the previous laboratory, which focused on validating the environment, this exercise concentrated on understanding how Windows Server behaves during normal operation.

Environment and Configuration

The laboratory was performed using the same virtual infrastructure established in the previous exercise.

Server Configuration

The server remained in a standalone WORKGROUP configuration, providing a clean environment before introducing enterprise identity services.

Key Activities Performed

1. System Information Validation

The first task was to confirm the operating system identity and current configuration using PowerShell.

Validation confirmed:

• Computer name
• Operating system edition
• Windows build number
• Current domain membership

This establishes confidence that administrative activities are being performed against the intended system.

2. Process Inspection

Running processes were examined using PowerShell to understand how Windows exposes process information.

This included:

• Enumerating active processes.
• Verifying that Windows Explorer was operating correctly.
• Identifying the account responsible for the Explorer process.

Although these tasks appear straightforward, process inspection forms part of everyday system administration and security investigations. Administrators frequently use process information to troubleshoot performance issues or identify unexpected applications running on a system.

3. Windows Services

Windows services represent the background components responsible for operating system functionality.

This laboratory examined:

• Active services.
• The Windows Event Log service.
• Service operational status.

Understanding service management is fundamental because many security incidents ultimately involve service misconfiguration, privilege abuse, or persistence mechanisms that leverage Windows services.

4. Network Validation

Network configuration was reviewed using PowerShell before validating external connectivity.

The laboratory confirmed:

• IPv4 addressing.
• Default gateway configuration.
• DNS server configuration.
• Successful communication with an external host.

Reliable networking remains a prerequisite for enterprise administration, remote management, Active Directory replication, and hybrid cloud services.

5. PowerShell Security Configuration

PowerShell execution policy was reviewed to understand how Windows controls script execution.

The server was configured with the RemoteSigned execution policy, providing a sensible balance between administrative flexibility and protection against unsigned scripts downloaded from external sources.

Although execution policies should not be viewed as a security boundary, understanding their purpose is an important aspect of secure Windows administration.

6. Remote Administration

The Windows Remote Management (WinRM) service was validated to confirm that the server supports modern remote administration.

WinRM provides the communication layer used by:

• PowerShell Remoting
• Windows Admin Center
• Enterprise automation tools
• Configuration management platforms

Remote administration capabilities become increasingly important as organisations manage hundreds or thousands of systems simultaneously.

7. Local Identity Management

Before introducing Active Directory, it is important to understand local identity management.

The laboratory reviewed:

• Built-in local user accounts.
• Local security groups.
• Administrative group structure.

Although enterprise environments primarily rely on domain identities, every Windows Server still maintains local security principals that require appropriate management.

This reinforces the principle of least privilege and the importance of understanding permission boundaries.

8. Active Directory Readiness

An attempt was made to query Active Directory using the Get-ADDomain cmdlet.

As expected, the command failed because Active Directory Domain Services had not yet been installed.

Rather than indicating a problem, this confirmed that the server remained in its intended baseline state and was ready for future domain deployment.

Installed Windows features were then reviewed to verify that Active Directory Domain Services remained available for installation in a subsequent laboratory.

9. Event Logging

Windows Event Logs were examined to understand how the operating system records administrative activity.

The review included:

• Recent System events.
• Historical error events.

Most of the observed entries related to routine service state changes and previous unexpected shutdowns.

Developing familiarity with normal event log activity is valuable because security analysts must first understand expected behaviour before they can identify anomalies.

10. Firewall Validation

The final validation task confirmed that all Windows Firewall profiles remained enabled.

Maintaining firewall protection throughout the early stages of server deployment reflects secure administrative practice and helps reduce unnecessary attack surface before additional services are introduced.

Operational Interpretation

This laboratory demonstrates that effective Windows administration extends beyond simply installing server roles.

Administrators must first understand the operating system that hosts enterprise services.

Many Microsoft technologies build upon this foundation:

Windows Server
        ↓
Active Directory
        ↓
Microsoft Entra ID
        ↓
Hybrid Identity
        ↓
Enterprise Security

Every layer depends upon the stability and correct administration of the layer beneath it.

For professionals working in identity security or detection engineering, understanding Windows Server administration provides valuable context when analysing authentication events, service behaviour, administrative actions, and security logs.

Key Learning Outcome

This laboratory reinforced that enterprise administration begins with understanding the operating system itself.

Rather than treating Windows Server as simply a platform for Active Directory, this exercise demonstrated how PowerShell enables administrators to inspect, validate and troubleshoot the core components that support enterprise identity services.

Key concepts reinforced include:

• Windows Server administration fundamentals.
• PowerShell-based administration.
• Process and service management.
• Local identity management.
• Network validation.
• Event log analysis.
• Windows Firewall configuration.
• Evidence-based system administration.

Conclusion

This laboratory successfully developed foundational Windows Server administration skills using PowerShell.

By examining processes, services, networking, local identities, event logs, Windows features, and firewall configuration, the environment was validated as operational and ready for future infrastructure services.

More importantly, the exercise demonstrated how infrastructure administration underpins enterprise identity and security.

The next stage will build on this foundation by introducing Active Directory Domain Services, marking the transition from standalone server administration to enterprise identity management.

Repository Context

This laboratory forms part of:

Phase 2 — Microsoft Infrastructure Administration Foundations

Laboratory: 2.2 Windows Server Administration Fundamentals

Portfolio progression:

Windows Infrastructure
        ↓
Windows Administration
        ↓
Active Directory
        ↓
Microsoft Entra ID
        ↓
Hybrid Identity
        ↓
Microsoft 365
        ↓
Azure Administration
        ↓
Identity Security
        ↓
Detection Engineering

Skills Demonstrated

• Windows Server administration
• PowerShell administration
• Process analysis
• Service management
• Local identity management
• Network validation
• Event log analysis
• Windows Firewall administration
• Infrastructure troubleshooting
• Evidence-based technical documentation
• Security-focused system administration