Have used Form Capture to get data from an external website and create lead/contact records - this is working well.
Have created some hidden text fields to capture extra data we need - this is working well
What I want to do now is have a hidden field on the form that has a static value - the field needs to map to a Lookup in Dynamics 365 Marketing a) is this possible to map to a lookup, b) if so, what value do I put on the external web page form (anything special because its a lookup etc).
Thanks
(note: if manually creating the landing page from scratch in Marketing to achieve what I want, I would add a hidden lookup field and set a default value - in this situation the form has to be via Form Capture not manually constructed)