SAP Netweaver AS Java 7.31 SP14 consuming webservices in a Microsoft Sharepoint 2013 Workflows (Nintex) environment via SAML

There is a possibility to consume webservices in SAP Netweaver AS Java 7.31, that may be configured in /nwa

-> SOA -> Single Service Administration: Service Definitions.

It works "fine" with basic authentication, but we want to consume webservices using SAML/ADFS authenticated users.

Is there a real step-by-step tutorial on how to consume a MS Sharepoint 2013 web service in AS Java 7.31 ?

What are the restrictions/constraints ?

Thanks a lot !