English to Portuguese Tech/Engineering Computers: Software curso

Alguém saberia o termo usado em BP para "Retained HR"?
O cliente forneceu uma explicação, mas não consigo encontrar o termo ideal: Retained HR are the HR Personnel left in the client side. Since their processes and their headcount was outsourced to us, there are still HR personnel who are left.
Contexto em que aparece:
Faxes and (Scanned) Mail Requests that come from Employees, Retained HR and Vendors
Email Requests to the Back Office that come from Retained HR and Vendors
Phone requests to the Back Office that come from Retained HR and Vendors

Obrigada