failed: Client not found in Kerberos database

proxy-ad ~ # net ads status
Enter root's password:
kerberos_kinit_password root@AD.TEST failed: Client not found in Kerberos database
kerberos_kinit_password root@AD.TEST failed: Client not found in Kerberos database
kerberos_kinit_password root@AD.TEST failed: Client not found in Kerberos database
proxy-ad ~ #

↑なぜこのメッセージが出るのかわからなかったけど、

下記のコマンドを打つと、

proxy-ad ~ # kinit administrator
Password for administrator@AD.TEST:
proxy-ad ~ #

proxy-ad ~ # net ads status
objectClass: top
objectClass: person
objectClass: organizationalPerson
objectClass: user
objectClass: computer
以下どっさり省略。。。

うまくできた。