If a workstation sends a print job to a Windows NT print server, which then forwards the job to another Windows NT print server, the print server that forwards the job uses a "null session" to forward the job. Windows NT 3.1 allowed null-session connections by default, so print job forwarding worked. Under Windows NT 3.5, the null-session is disabled by default, preventing job forwarding. You can enable null-session support by manually editing the registry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters. Here you will find a value named NullSessionShares. Edit this value, and add a new line containing the sharename for the printer. This change does not take effect until you stop and restart the Spooler service.