This is my setup. I am connecting to a Windows 2003 server. Everything was working fine with my old setup : 3.0.20b. krb5-1.6: (I also tried it with krb51-.5); ./configure --without-tcl --enable-shared samba-3.0.24: ./configure --with-ads --with-ldap --with-krb5=/usr/local/ smb.conf: [global] netbios name=MACHINE NAME workgroup = MYWORKGROUP realm = myactivedirectoryrealm server string = Samba Server security = ADS password server = ad.university.edu log file = /var/log/samba/log.%m name resolve order = wins lmhosts host bcast socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192 os level = 0 preferred master = No local master = No domain master = No dns proxy = No wins server = winsa.uiuc.edu, winsb.uiuc.edu idmap uid = 10000-600000 idmap gid = 10000-600000 winbind cache time = 600 winbind use default domain = Yes strict allocate = Yes client schannel = no winbind enum users = yes winbind enum groups = yes smb ports = 139 wbinfo -m and wbinfo -t and wbinfo --sequence returns what it is suppose to. ]# ./smbclient -L MACHINENAME -Uuserid [works fine] Password: Domain=[MYDOMAIN] OS=[Unix] Server=[Samba 3.0.24] Sharename Type Comment --------- ---- ------- DSDWEB Disk Media Server web share IPC$ IPC IPC Service (Samba Server) [...] But when I log in from the windows machine \\machinename, I get the list of the shares. When I click on the share, I get the password prompt. log.winbindd: [2007/03/06 10:28:35, 0] nsswitch/winbindd_util.c:trustdom_recv(268) Got invalid trustdom response [2007/03/06 10:33:13, 0] lib/util_sid.c:string_to_sid(242) string_to_sid: Sid S-0-0 is not in a valid format. [2007/03/06 10:33:13, 0] nsswitch/winbindd_util.c:trustdom_recv(268) Got invalid trustdom response log.smbd: [2007/03/06 10:23:10, 0] smbd/server.c:main(881) standard input is not a socket, assuming -D option [2007/03/06 10:33:07, 0] smbd/server.c:main(881) standard input is not a socket, assuming -D option