B1 user authentication without license as DI-SERVER

Hello experts,

I have a customer that already use a solution with Di-SERVER to insert invoices, and we're now migrating to B1if. Everything is work fine, except about the b1 users login. With DI-SERVER, the invoices can be inserted with user without b1 ordinary licenses. On B1if, it was tested many authentication types, Basic Authentication, B1 Authentication, User Authentication (sap.Xcelsius), and all of them are returning the same error - (100000048) No SAP license. The users has B1i license setted and all are SuperUser. Any ideas about it? Is there anyway to login users without SAP license like DI-SERVER?

Regards,

Leo.

PS: I'm using WebService as inbound.