Resolving Error Code 0x800f081f: Missing Source Files on Windows Server 2019

The 0x800f081f error frequently appears during installations or updates in Windows Server 2019, indicating missing or corrupted source files. Here's how to address this issue:

1. Verify internet connectivity: Ensure the server is connected to a reliable internet service. A poor connection can disrupt the file download process.
2. Utilise the DISM tool: The DISM (Deployment Image Servicing and Management) tool helps repair the Windows image and recover lost or damaged files. Steps to use the DISM tool are as follows:
   a. Launch the Command Prompt with administrative rights.
   b. Enter the command: DISM /Online /Cleanup-Image /RestoreHealth and hit Enter.
   c. Allow time for the process to finish, which might vary based on the image size.
   
3. Employ the System File Checker (SFC) tool: The SFC tool scans for and fixes corrupt system files. To use the SFC tool, proceed with:
   a. Open Command Prompt as an administrator.
   b. Execute this command: sfc /scannow and press Enter.
   c. The completion time may vary, depending on your system files' size.
   
4. Run the Windows Update Troubleshooter: This tool diagnoses and resolves update-related issues. To use the Windows Update Troubleshooter, follow these steps:
   a. Navigate to Settings > Update & Security > Troubleshoot.
   b. Select Windows Update then click on 'Run the troubleshooter'.
   c. Adhere to the instructions displayed on-screen to finish the troubleshooting.
   
5. Manually download files: If the previous methods fail, manually download the required files from the Microsoft website and install them on your server.

Implementing these strategies should resolve the 0x800f081f error, enabling successful installation or updating of necessary features on Windows Server 2019.