I saw this mentioned briefly in step 6 but I completely overlooked it so I figured I would go into details based on information I found the hard way. BTSync stores all configuration files under: NT5 (Windows XP/Server 2003/Server 2003r2): "%USERPROFILE%\Application Data\BitTorrent Sync" NT6 (Windows Vista/7/8/Server 2008/Server 2008r2/Server 2012): "%USERPROFILE%\AppData\Roaming\BitTorrent Sync" This means all BTSync settings are user-specific. By default the installation method mentioned here runs the service using the LocalSystem account. Because there is no way to log in to LocalSystem it is impossible to configure BTSync under the LocalSystem account. To get the service to work properly you must log in with a named account, configure the application, then set the service to log in using that named account. For example, if you are using a computer on a domain: 01) Create an account on the domain controller for the BTSync service 02) Log into the computer you will be running the service on using the BTSync account 03) Install BTSync and setup your shares 04) Exit BTSync, install the service as detailed in the first post and verify it can be started 05) Open Services.msc, stop the BTSync service and open the BTSync service properties 06) Click the Log On tab 07) Select the "This account:" bullet 08) Enter the fully qualified user name 09) Enter the password for this account 10) Save changes and start the service with the new settings Tested this Friday night, works like magic.