EXHIBIT 23.1 CONSENT AND REPORT OF INDEPENDENT AUDITORS We consent to the incorporation by reference in this Annual Report (Form 10-K) of ProBusiness Services, Inc. of our report dated July 29, 1999 included in the 1999 Annual Report to Stockholders of ProBusiness Services, Inc. Our audits also included the consolidated financial statement schedule of ProBusiness Services, Inc. listed in Item 14(a). This schedule is the responsibility of the Company's management. Our responsibility is to express an opinion based on our audits. In our opinion, the consolidated financial statement schedule referred to above, when considered in relation to the basic consolidated financial statements taken as a whole, presents fairly in all material respects the information set forth therein. /s/ Ernst & Young LLP Walnut Creek, California September 24, 1999