I have the following:
We got a server with a domain "mydomain"
There is a computer A with UserA configuration and a shared printer with windows XP.
and I have a netbook computer with windows 7(Computer B) which is outside the domain but its user (UserB) is already set up in the server, so I can access to the shared folders in the server.
The problem is that UserB/ComputerB, can't connect it to the shared printer in ComputerA, because is always asking for a valid user, I have used most of the admin users of the servers without success.