To access the command-line interface (CLI) in a Windows Server, you can use the Command Prompt or Windows PowerShell. Both of these tools provide a text-based interface for entering and executing commands to perform various system tasks and administrative tasks. Here's how you can access each of them:

1. **Command Prompt**:

The Command Prompt is a traditional command-line interface in Windows. To access it:

- Press the `Windows key + R` to open the "Run" dialog.
- Type `cmd` and press `Enter` or click "OK."
- This will open the Command Prompt window, where you can type and execute commands.

Alternatively, you can also find the Command Prompt in the Start menu:

- Click the `Start` button.
- In the search bar, type `cmd`.
- Click on the "Command Prompt" search result.

2. **Windows PowerShell**:

Windows PowerShell is a more powerful and modern command-line shell that offers more advanced scripting capabilities compared to the Command Prompt. To access it:

- Press the `Windows key + R` to open the "Run" dialog.
- Type `powershell` and press `Enter` or click "OK."
- This will open the Windows PowerShell window, where you can type and execute PowerShell commands.

Like the Command Prompt, you can also find Windows PowerShell in the Start menu:

- Click the `Start` button.
- In the search bar, type `powershell`.
- Click on the "Windows PowerShell" search result.

Remember that when using the Command Prompt or Windows PowerShell in a Windows Server environment, it's a good practice to run these tools with administrative privileges. You can do this by right-clicking the respective tool (Command Prompt or Windows PowerShell) and selecting "Run as administrator."

Both the Command Prompt and Windows PowerShell are powerful tools for system administration, troubleshooting, and automation tasks in a Windows Server environment. The choice between them often depends on the complexity of the tasks you're performing and your familiarity with the specific syntax and capabilities of each tool.