We are using in our company a couple of Brother-printers that have the ability to setup Restricted functions, so we deployed it so that the users need to enter a PIN before printing. In the printer, we setup all the users based on the first half of their mail address, with a specific code (e.g. for a user John Doe it is j.doe as username, which is the same as the first half of the UPN).
With the latest update of one of the printers, native Universal Print became available, and I started testing it. Without restricted functions, everything works fine. If we enable the restricted printing, it doesn't work as the username that is sent to the printer is "John Doe". Unfortunately, I cannot enter spaces in the fields that are used in the printer configuration, so it would be nice if we could change this in the Universal Print setup so that the username that is sent to the printer will be "j.doe".