So I have a Web Form, where the user Enters a Unique number which is already exists in a Custom Object along with few other fields in the form.
On hitting submit this creates a new Lead in Salesforce along with the unique number field mapped to Salesforce field on Leads.
Now my requirement is I need to map this Lead to the Custom Object record to which that Unique number field matches to. How can I achieve this ? Anything I can do while creating Web form ? or upon creation of lead can I track for the custom object record ID using this unique number field ?