Add Ubuntu to your Windows Active Directory

open / install likewise
sudo apt-get update
sudo apt-get install likewise-open
sudo domainjoin-cli join fqdn.of.your.domain Administrator
   
open defautls
sudo update-rc.d likewise-open defaults
sudo /etc/init.d/likewise-open start
   
reboot and login
with domain\user credentials

check settings
within terminal you can check your settings

check active directory
for your new created object