Passing Data From SP to IdP
It is possible to retrieve XPATH data sent from the SP and relay it to the IdP. This can be accomplished using the payloadElementsForward property of fidm.saml.idp.setConfig which will forward data from the SAML payload to the IdP's proxypage via the query string.
Passing Data in Custom Parameters
It is possible to pass data from the SP to the IdP Proxy Page using custom parameter names. To achieve this, simply add the additional parameters to the request URI, e.g.,