Custom CRM lead fields

Hi, I am working on mapping our form on website with Dynamics CRM and I’ve stumbled to one simple problem – I have custom fields on the CRM end (for example there’s a field called “personal or business”) and if I try to find this custom made field on WordPress end when creating Dynamic Feeds and mapping my website form with CRM, there’s no such an option as “personal or business” so in other words I can only choose from the existing options/fields and not something I’ve created manually.

Is there a solution or I’ll have to pick something from the list on WP and then manually move data from one field to another on CRM?

Thanks!