Nuxeo Live Edit is now deprecated, you should use Nuxeo Drive Edit, see Online Editing section of Nuxeo Drive documentation.
To install MSOffice Live Edit in silent mode, without any user interaction:
msiexec /i nuxeo-liveedit-msoffice.msi APPLICATIONFOLDER="c:/your/install/path" /qn
More Live Edit Admin Documentation
Configuring a Reverse Proxy to Work with Live Edit and Client Certificate Authentication Configuration Examples
Other Live Edit Related Documentation