The SOAP endpoint address where the SOAP message is posted is consistent with the endpoint of the WSDL.

In some cases, however, the WSDL may reference an incorrect endpoint URL. If this happens, it is necessary to over-ride the generated URL by creating the property com.glide.soap_address_base_url to contain the new URL. You may have to add the property manually as this is not an base system property.

For instance, a generated SOAP endpoint may look like this:
https://instance.service-now.com/incident.do?SOAP
You can specify a property to define the endpoint such that it goes through a proxy by setting the property:
com.glide.soap_address_base_url = "https://myproxy.mycompany.com/service-now/"
This will result in the endpoint being generated to appear as:
https://myproxy.mycompany.com/service-now/incident.do?SOAP