Hello,
The error code 30183-2056 (400) typically indicates a problem with the installation process. To troubleshoot this issue, I recommend the following steps:
- Ensure that the XML configuration file is correctly formatted and does not contain any errors. You can validate the XML file using an online XML validator tool.
- Check if there are any pending Windows updates on the affected computers and install them before attempting to install Office 2019.
- Run the Office Installation troubleshooter tool provided by Microsoft to identify and fix any issues with the installation process.
- Temporarily disable any antivirus software or firewall on the computers that may be blocking the installation of Office 2019.
- If the issue persists, you may consider performing a clean boot on the affected computers to isolate any third-party software conflicts that could be causing the installation failure.
If the Answer is helpful, please click "Accept Answer" and upvote it.