iProcurement Smart Form Suppliers Selection

Hi,

iProcurment Catalog Admin > Stores > Smart Forms > New

I'm creating a new Smart Form, however, when I attempt to enter an existing supplier (via the search) I cant find them.

This is within Default Supplier Information > Supplier Name field.

I can find a number of other suppliers, but I have noticed a number are not within the results.

Is there a particular setup a supplier needs so they can be selected for this?

The supplier is active. They have a number of sites, I cant find them using this function either.

Any advice would be great.

Thanks in advance.