Reinstall BestSync service

[remonb]

Is it possible te (re)install BestSync service without restarting the server?

BestSync service (services.msc) is disappeared on 2 servers (Server 2012r2)

I hope you can help me

[RiseFly]

You can just run following command line to reinstall BestSync service.
Start Windows command line tools (%windir%\system32\cmd.exe) by "Run as Administrator" context menu:
>cd C:\Program Files\RiseFly\BestSync
>BestSyncSvc.exe /install
>BestSyncSvc.exe /start