Imports update metadata (but not content files, approvals, or server settings) to this server from an export package file ...

Imports update metadata (but not content files, approvals, or server settings)
to this server from an export package file created on another WSUS server.
This synchronizes this WSUS server without using a network connection.

import  

: 
   
    Path and filename of the package CAB file (or GZIP file with an .xml.gz 
    extension) to import
   
: 

    Path and filename of the log file to create