Fetch CRM Field from Another Creator Form

Fetch CRM Field from Another Creator Form

How do I fetch a CRM field from another Creator form? 

Order form has a drop down "Generator" linked to Generator form.  Generator form has an Account CRM field.  I have an Account CRM field that I want to update in my Order form based on the Account linked to the "Generator" drop down.  (For us Generator is an environmental term for a facility that requires service / Account is the company that will pay the bill.)