Apple ID password, multiple devices, 2 Step Verification

Got a buddy who is the IT manager here at our local hospital. There are 30 iPads here and other places across the Province, all on the same Apple account. Someone attempted guessing the Apple ID password too many times. A verification code was sent to one of the 30 devices but my buddy doesn’t know which one. All are now locked out of the Apple account. What can advise my friend to do next? Call Apple? Or is there an easier way? Yes, he’s the IT specialist and should be able to resolve this, but they are just getting to know how Apple devices function in a corporate environment and he’s not too pleased with Apple at the moment. Any ideas?

via ehMac.ca http://bit.ly/2GHfiGw