External applications can open a Portrait form and prefill values via URL parameters. The URL parameters are matched with the field names of a form.
Example given, the following fields are defined in the form createOffer:
customerNumbercustomerName
The following URL will open the form with values:
https://portrait.customer.xyz/form/createOffer?customerNumber=10000&customerName=Meller
Use the exact name with correct upper/lower case