- Use one central database in the main site and configure it using sql authentication (user = lssqluser, password = ...)
- Install the service on a server in all your locations and point to the central database. (let the service run under an administrative account for that site)
- In all the sites, let the lsclient connect to the server in it's site -> the service scans the client -> the service sends the data to the central database.
One remark : make sure that you don't have duplicate computernames in the different sites.