[ubuntu] Ubuntu join Windows Domain help

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http://ubuntuforums.org – Hi, I'm running Ubuntu 10.04.4 LTS and Windows Server 2008 R2. I'm trying to join the Ubuntu server to the windows domain. I have followed many tutorials including... http://anothersysadmin.wordpress.com...in-ubuntu-804/ Several others to do with samba/kerb. At the current moment the command I'm trying to use which has had the most success is; net ads join -U systemadmin Resulting in... kerberos_kinit_password UBUNTU@DOMAIN_CENSOR.LOCAL failed: preauthentication failed I'm 100% sure I'm using the right username/password. Any help is much appreciated, Scarrez (Hardware)