Likewise is easier to get to work. But configuring it is not as easy as that.
apprentice@testbox:~$ apt-get install -y likewise-open
apprentice@testbox:~$ sudo domainjoin-cli join mywg.domain.com AdminUser VerySecretPasswd
Joining to AD Domain: mywg.domain.com
With Computer DNS Name: test-box-13-12.mywg.domain.com
SUCCESS
You should reboot this system before attempting GUI logins as a domain user.
(without rebooting!)
apprentice@remote:~$ ssh 'mywg\aduser'@192.168.13.35
Password:
MYWG\aduser@test-box-13-12:~$
It still works.