OS X Server: Kerberizing services with an Active Directory realm
If your computer is connected to an Active Directory server, you can use a command to kerberize your services with the Active Directory Kerberos realm.
Use the following command in Terminal as an admin user to kerberize your services with an Active Directory Kerberos realm. Enter the short name of a local admin user for user_name.
sudo /usr/sbin/dsconfigad -enablesso -localuser user_name