VERIFIED SOLUTION i

How to find the EngageOne Webservices wsdl/schemas and documentation

The wsdl can always be retrieved directly from the server as specified in the "Programmer’s Reference Guide for Generation 2 Web Services" (p. 156)

http://<engageone-server-host>:<server-port>/EngageOneWS/DataPushService?wsdl

For 3.0.5 this includes the MSEC authContext section.

You can also find the full wsdls and xsds under "<EngageOne Install Folder>\Samples\wsdl\gen2".
Environment Details
Product Feature: Web Service (API)
UPDATED:  November 8, 2017