"Where's the manual? How can we know how to use the thing without a manual? What are you doing about it?!?"
In short, nothing.
I'd probably be less pissed-off about it if the manuals for all the other kit we've ever had in the library hadn't been sent to my office on arrival and that not a one of the systems manuals I've ever written for the buggers has ever been seen to be available to staff on desk or counter.