If the PING command cannot be used for checking availability of the central share, Kappris can use a PowerShell command instead.
Edit the [Computer] section of config.ini as below to add the command:
[Computer]
Cache Sync Interval=3600
Use Central Configuration=False
Server Check Command=powershell $ExitCode = @{$True = 0; $False = 1};$RC = (Test-NetConnection %SERVER_NAME% -port 80 -InformationLevel Quiet); exit $ExitCode[$RC]
Sample config.ini