qalab_server name pops up and authentication prompt and the following appears in the smbd.log file on the new server: [2009/09/14 17:35:14, 1] smbd/sesssetup.c:reply_spnego_kerberos(316) Failed to verify incoming ticket with error NT_STATUS_LOGON_FAILURE! Do XP clients do some additional checking to see if there's another server out there with the same name? We've modifed both the hosts and lmhosts file on the XP client and also tried setting up the "netbios aliases" config option on the new server to no avail. At one point I noticed an error in nmbd.log file: [2009/09/14 17:11:50, 0] nmbd/nmbd_nameregister.c:register_name_response(130) register_name_response: server at IP 10.49.4.92 rejected our name registration of QALAB_SERVER<20> IP 10.49.104.69 with error code 6. Indicating that we probably lost some sort of election to the "real" Win 2k3 server... however, the Fedora client via smbclient still happily connects without complaints with the QALAB_SERVER name... Any ideas here? Ray