Well, it turns out that joining Ubuntu 14.04 to Active Directory Domain using realmd is not an easy task. This tutorial worked for me: stephenfritz.blogspot.it/2014/04/linux-microsoft-active-directory_28.html
The key point is inserting # to comment out the statement: use_fully_qualified_names = True -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1317201 Title: Enterprise Login not working out of the box in Ubuntu 14.04 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/realmd/+bug/1317201/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs