If you see this below error: "A connection was successfully established with the server, but then an error occurred during the pre-login handshake. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.)" This means there is a connection issue and the connection with your accounting system is not functioning. 

Wait for an hour for this error to clear up in the next run, if you still see this error you would need to speak to your accounting system consultant.