Facing issue to connect from web job( in Azure app service) to SQL server (On Premises)

Question

On local it works fine. In Azure gives the error as Server not found or network specific instance not found.

We have 2 connection strings in app.config file.

1. One connection string is in <appsettings> section
2. Another connection string is under <Entityspaces> which is third party tool we are using.-

`

 <Entityspaces>
     <connectioninfo>
      <conenctions>
        <add name="" proivdermetadatekey=""> etc
      </conenctions>
     </connectioninfo>
    </Entityspaces>

`

The connection string in apsetting is working fine. Connection string which is in another section entityspaces is giving issue