Intune Installation Problem

Take this:

1. Error 0x80070643: Fatal Error During Installation
This error often occurs due to:

• Conflicts with existing Office installations.
• Insufficient permissions for the SYSTEM account.
• Issues with the Windows Installer service.

Steps to Resolve:

• Uninstall Office 2019 Completely: Use the Microsoft Support and Recovery Assistant (SaRA) tool to ensure all remnants of Office 2019 are removed before deploying MS365.
• Grant SYSTEM Permissions: Ensure the SYSTEM account has full control over the installation folder.
• Enable Verbose Logging: Add logging parameters to your installation command to capture detailed logs. This can help identify the root cause of the failure.

2. Error 0x8007426E
This error is less common but can occur due to:

• Incorrect XML configuration.
• Pre-installed Office versions conflicting with the deployment.

Steps to Resolve:

• Check Pre-installed Office Versions: If the devices came with pre-installed Office Home or Student versions, ensure they are removed before deploying MS365.
• Test the XML Script: Run the XML script manually on an affected device to verify its functionality. Use tools like PsExec to run the installation as the SYSTEM account.

3. Optimize Your XML Script

• Remove Duplicate Properties: You have two FORCEAPPSHUTDOWN properties with conflicting values. Keep only one with Value="True".
• Simplify the Configuration: Remove unnecessary properties like SCLCacheOverride and DeviceBasedLicensing unless they are critical for your deployment.

4. General Recommendations

• Use Intune Logs: Check the IntuneManagementExtension.log file on affected devices for detailed error messages. This file is located in C:\ProgramData\Microsoft\IntuneManagementExtension\Logs.
• Test on a Clean Device: Deploy the app on a freshly imaged device to rule out conflicts with existing software.
• Update Intune and Office: Ensure you are using the latest versions of Intune and Office deployment tools.