Work around process for having a service request form field match data from an Insight LookUp field

[Patricia Crabb]

"Some fields used by an issue type are not supported for use in the customer portal; if you include these fields on a request type, they will automatically be added to the Hidden fields with preset values section and you'll be required to set a value for them."

I have a field from my Insight Assets Object Schema that seems to trigger this and it is a value field with multiple options - is there a way to configure the field for use by the portal so I can add it to a field on the submission form?