I have one integration field that provides me the account name from the accounts module in Zoho CRM. It works fine.

I would also like to populate another field with a custom field value in the Accounts module for the same account.

For example the account name field display Widget ABC

and the custom field, "Account Number", should display the related field "1234"

How does one accomplish this? I'm trying to use a formula field but can't seem to figure it out. The custom field does not show as an option in the integration field of the Zoho Creator Form.