List of databases is not shown in the DBConfig
The SQLServer is installed in LAN and p4b with DBConfig is installed local. In the DBConfig you can see the Database server name but cannot see the list of databases.
You should start the SQL Server Browser and enable the TCP/IP port.
Start the SQL Server Configuration Manager and open Properties for the SQL Server Browser.
Set** the **Start Mode to Automatic.
Start the SQL Server Browser.
Most probably you should also enable the TCP/IP port.
And then restart the SQL Server.