- add "/auto" command line parameter

I supposed Dji think you add the parameters in the shortcut properties of TimeSync in your Liberkey : Right click on TimeSync => Shortcut properties => Advanced like this :

You have to configure the Liberkey to run when Windows starts : Liberkey tools => Configuration => advanced options => Starts Liberkey at Windows startup/logon and verify in Liberkey tools => Configuration => Autorun you have enabled autorun .

>> Auto Mode

Option /auto is available if you want to run TimeSync from the StartUp Folder:
After making a shortcut in the startup folder, open the properties (right click), and add "/auto" in the target field (separated by space).
With this option the window will show only, if the clock offset exceeds a given limit (see settings), or if TimeSync cannot connect to a server.