How do I test an HTTPS connection?
If you are testing a Web Service (AtomSphere as the endpoint), you can refer to the link below on how to invoke your web service.
If you are testing the HTTP Client Connector connecting to an endpoint outside of AtomSphere, you have to create a process with this connector and run this in Test Mode. You can refer to the link below on information about Test Mode.
To Run a Processin Test Mode
+1 on Raphael Rivero's suggestion.
If testing an outbound connection to a web service, I might also recommend How to Configure Charles Proxy to Monitor Advanced Atom Traffic.
Simply you can use HTTP Client Connector in Boomi or can REST Project in SOAP UI to Test HTTPs service.
You also can simply test your Https URL in browser by giving URL authentication details(username and Password).
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