I read your post and you seem to think that drivers might be optional. The problem many IT staff struggle with is deploying a working set of drivers where needed. I can't tell if you figured this out or not.

The word ADMIN came up and that's another tripping block for some new IT staffers. They'll try it on reduced capability user accounts.

No mention of the connection on that admin computer so I'm left to guess that it was something else than ethernet.

The details are missing so I'm left to GUESS you don't know the IP address of the printer to use when it's on your network.