Unexpected error during installation.(0x80070643)

Check the Installation Logs

Since the error message suggests checking the logs, start by reviewing the Intune logs on an affected device:

📌 Log File Location:

• Open C:\ProgramData\Microsoft\IntuneManagementExtension\Logs\IntuneManagementExtension.log
• Open C:\Windows\Temp\Microsoft Office logs (if available)
• Check Event Viewer > Windows Logs > Application for MSI/MSP-related errors

2. Remove Any Existing Office Installations

Get-OfficeVersion