We were able to get the remote system to log in. But, of course, Quickbooks being the POS (that's Piece of Shit) software that it is, brought the remote user up in single user mode. So when we tried to access the database with the second - and database - machine - it pucked all over itself.
Then, we we tried to switch to multi-user mode on the remote machine, Quickbooks decides it can't talk to the host any more. What a truly amazingly, seriously BAD product.