Banking Options and Data Masking
The Enable Mask option determines the masking of bank account numbers on the Maintain Bank Accounts page for administrators, as well as Personal Bank Accounts (Classic) and Bank Accounts (Fluid) self-service pages for employees.
This example illustrates the fields and controls on the Security section of the Self Service Banking Options page.

Regardless of this setting, payee account numbers are still masked in the database once the encryption is run.
All account numbers on the wage statements (HTML online pages and PDFs) are also masked when the encryption is run.