Hi @RobinP 
Thanks for posting your question! Here’s a support article that may help with this:
Masking and unmasking sensitive data in ProSeries

It says "ProSeries Basic can mask data on-screen, ProSeries Professional can mask data on-screen and when printing."

If you need further assistance with this we would reach out to ProSeries Support, as they can best help with your specific situation.
Looking forward to seeing more of your contributions in the Community!