The 'We can't find (employee name) in Sage 50 Payroll' message disappears, and the employee's payslips can then be viewed from their profile.
NOTE: You must make sure the email address in both Sage HR Online Services and Sage 50 Payroll are identical (including capitalisations) for the profiles to link. If not, when you upload the employees payslips a separate new profile will be created in Sage HR Online Services with the different email address.