Update SFDC Object Fields Using Marketo Form

[Anonymous]

I have created a custom object in SFDC that has been successfully synced over to Marketo.  When I click into the object and click on fields in mkto I see the fields that I need.  However, when I create a form and  I try to map one of the questions to one of those fields it does not appear.........Any thoughts on how I can have forms submit updates for those fields?

[Josh_Hill13]

You cannot write to Custom Objects, they are read only, thus you will not see them available for Forms.

If you want to write to a custom SFDC object, then you'll need to use webhooks or jquery and build a special form.