If a user has no printers shown in the dashboard (My Docbox > My Printers) or in the Print Driver, it is because they have not been granted access to any printers.
How access is granted depends on how your organisation manages users in Docbox.
If your organisation uses Active Directory
Add the user to the appropriate AD group within your AD system. Access will be updated at their next login.
If your organisation manages users directly in Docbox
An administrator can grant printer access in the Control Panel under Users > [username] > Printer Access.