Has any HCM 9.2 customers (using SSO) enabled the updatable W-4 .pdf forms and bypassed the login pr

We're in the process of enabling the updatable W-4 .pdf forms for ESS but are encountering a blocker with the login prompt presented at the time of form submission.  In our SSO environment, the EE uses their network credentials as opposed to  PSOPRDEFN credentials. There are many employees, at this point, that could not even remember their PSOPRDEFN credentials.  Has anyone had success in bypassing this secondary login requirement? We can successfully configure and update the respective tax withholding changes but this secondary login is creating quite a challenge.  Thanks in advance for any input!