How to Enable Debug Logging for Salesforce Connector in Mule 4

With Mule 4, refer to How to Set the Log Level for a Mule Application in Different Environments to enable DEBUG logging for the following package:

org.mule.extension.salesforce

Once applied, check the following entries in your application's log file:

DEBUG 2019-08-28 14:18:11,824 [[MuleRuntime].cpuLight.01: cpuLight@org.mule.extension.salesforce.internal.connection.provider.CachedBasicConnectionProvider.initialise:222 @66edf98c] [event: ] org.mule.extension.salesforce.internal.connection.provider.AbstractConnectionProvider: Sending request to https://org.my.salesforce.com/services/Soap/u/46.0/00DL000000629we
DEBUG 2019-08-28 14:18:11,825 [[MuleRuntime].cpuLight.01: cpuLight@org.mule.extension.salesforce.internal.connection.provider.CachedBasicConnectionProvider.initialise:222 @66edf98c] [event: ] org.mule.extension.salesforce.internal.connection.provider.AbstractConnectionProvider: <?xml version="1.0" encoding="UTF-8"?><env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/" ... (and more)
DEBUG 2019-08-28 14:18:12,030 [[MuleRuntime].cpuLight.01: cpuLight@org.mule.extension.salesforce.internal.connection.provider.CachedBasicConnectionProvider.initialise:222 @66edf98c] [event: ] org.mule.extension.salesforce.internal.connection.provider.AbstractConnectionProvider: Receiving response from https://org.my.salesforce.com/services/Soap/u/46.0/00DL000000629we
DEBUG 2019-08-28 14:18:12,030 [[MuleRuntime].cpuLight.01: cpuLight@org.mule.extension.salesforce.internal.connection.provider.CachedBasicConnectionProvider.initialise:222 @66edf98c] [event: ] org.mule.extension.salesforce.internal.connection.provider.AbstractConnectionProvider: <?xml version="1.0" encoding="UTF-8"?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"...(and more)

For CometD (Bayeux) client debug logging, please see How to Enable CometD (Bayeux) Client Debug Logging for the Salesforce Connector.