The SADMS package allows for automated joining to Active Directory through a GUI interface. This page will describe how to install/troubleshoot using SADMS to join a Ubuntu machine to Active Directory. 
Acquire the SADMS Ubuntu package
- Read the tuts from the SADMS site first, under the External Docs section.
- Extract Package
- check that nsswitch is correct. Shadow should not reference winbind. Shadow passwords will be retrieved through the pam implementation of winbind.
passwd: compat winbind group: compat winbind shadow: compat
- Install Winbind dependency, then run the START script from the directory you extracted the SADMS archive to:
sudo apt-get install winbind sudo ./START
- Detect your Domain settings, fill in the missing information and Install.
- When you install samba's winbind to Pam, unselect the Pam_mount module as it doesn't seem to install properly through sadms in version 2.0.11, it causes graphical sudo authentications to fail.
kdesudo and gksudo failing The pam module pam_mount.so refers to a config file located in /etc/security - pam_mount.conf. pam_mount.conf appears to be configured incorrectly and causing kdesudo and gksudo to break. One must either decipher pam_mount.conf or disable pam from mounting shares at login. /etc/pam.d/common-auth: comment out this line
auth required pam_mount.so
(http://ubuntuforums.org/archive/index.php/t-215791.html) No Logon Servers This is caused by a problem with name resolution of the logon server. The name service cache daemon (nscd) can interfere with winbind, as winbind maintains its own cache. Remove it.
sudo apt-get remove nscd