Thank you everyone for your advice / suggestions. I have made a little progress, but still not able to map to my share through Active Directory. I wanted to post some of the things that I tried: Replaced /usr/lib/nss_winbind.so with what was in the source directory for Samba-3.3.3. Created softlink to /usr/lib/nss_winbind.so.1 from /usr/lib/nss_winbind.so. Replaced /lib/libnss_winbind.so with what was in the source directory for Samba-3.3.3. Created softlink to /lib/libnss_winbind.so.2 from /lib/libnss_winbind.so (http://www.samba.org/samba/docs/man/Samba-HOWTO-Collection/winbind.html) I added winbind enum users = yes & winbind enum groups = yes to smb.conf (though my other setups do not have this) and still nothing. After a server reboot, I got getent passwd to work - for about 5 minutes - and then nothing. One of the error logs said my idmap was full, so I increased the size in my smb.conf file from 1000-2000 to 1000-200000. However, that has had no effect. I'm not able to map to the share drive (though someone said that winbind is not necessary). I did finally get getent to produce results by stopping nscd service. I discovered this document where it details the NSCD issue - http://www.samba.org/samba/docs/man/Samba-HOWTO-Collection/winbind.html (bottom of the page). Once I stopped that service, getent passwd & getent group produced results from my AD. Now the issue is that I am still not able to mount to the share folder on the server. My machine name log file also has this, which has me concerned: [2009/06/16 12:48:21, 0] lib/util.c:smb_panic(1673) PANIC (pid 1853): sys_setgroups failed [2009/06/16 12:48:21, 0] lib/util.c:log_stack_trace(1827) unable to produce a stack trace on this platform [2009/06/16 12:48:21, 0] lib/fault.c:dump_core(231) dumping core in /usr/local/samba/var/cores/smbd In the log file for my IP address, I show this: [2009/06/16 13:04:57, 1] smbd/sesssetup.c:reply_spnego_kerberos(350) Failed to verify incoming ticket with error NT_STATUS_LOGON_FAILURE! I thought maybe my Kerberos ticket had expired, so I reissued it, but this message continues to display. I also thought it might be a firewall issue on the server, so I modified the ipf.conf file, added my IP address (with ports 139/445), and restarted it. Still nothing. In my log file for my domain, I have this (last few entries): cli_pipe_validate_current_pdu: RPC fault code DCERPC_FAULT_ACCESS_DENIED received from host DC-1.ds.vanderbilt.edu, pipe \samr, fnum 0x800b! My other installs of this setup work well, so I'm not sure what is going on here. I did try the suggestion of not even using winbind, modifying my smb.conf file accordingly, but that didn't work either. I'm really at a loss here. *********************************** * Jamen McGranahan * Systems Services Librarian * Library Information Technology Services * Vanderbilt University * Suite 700 * 110 21st Avenue South * Nashville, TN 37240 * (615) 343-1614 * (615) 343-8834 (fax) * jamen.mcgranahan@vanderbilt.edu ***********************************