Connect Ubuntu Box to AD

This will show you how to join an Ubuntu PC to a Windows domain so that AD users can log into the Ubuntu machine and will also allow file sharing with AD permissions.

Additional useful links:

https://serverfault.com/questions/166768/kinit-wont-connect-to-a-domain-server-realm-not-local-to-kdc-while-getting-in

https://access.redhat.com/discussions/497493