I like the zcm printer policies and we use it.
For iprint printers no problem. It's fully silent.

But for windows shared printers it's not silent.
If the user logged on his workstation he get's a window with something like "connecting to PRT01, and it has a cancel button.

Why that design?, The user don't want a screen with a cancel button, he only wants the printer silent, on the same way as an iprint printer.