On a 2003 terminal server with netWare 4.91 SP1 client, people can't
login with their domain account. I can always login with the local
admin account. Here is what the message looks like in the event

Event ID 1219:
"Logon rejected for domain\username. Unable to obtain Terminal Server
User Configuration. Error: The network address is invalid."

As soon as I uninstall the NetWare client, everything works perfectly.