The below documentation outlines the necessary Alma settings to make sure metadata is properly transmitted from an EDS resource request to ILLiad forms.

Additional information on setting up General Electronic Services from the CSU libraries - https://calstate.atlassian.net/wiki/spaces/UEC/pages/422674565/General+Electronic+Services. The section titled "Tip for selecting fields and values to use in your parameters" is particularly helpful in identifying resource parameters that you can use in Service Availability Rules.