bigon@fornost:~$ sudo adcli join -v -D bigon.be
 * Using domain name: bigon.be
 * Calculated computer account name from fqdn: FORNOST
 * Calculated domain realm from name: BIGON.BE
 * Discovering domain controllers: _ldap._tcp.bigon.be
 * Sending cldap pings to domain controller: bigon-e80ef7e8e.bigon.be
 * Received NetLogon info from: bigon-e80ef7e8e.bigon.be
 * Wrote out krb5.conf snippet to /tmp/adcli-krb5-xt4sDb/krb5.d/adcli-krb5-conf-Wdh5At
 ! Couldn't authenticate as machine account: FORNOST: Preauthentication failed
Password for Administrator@BIGON.BE: 
 * Authenticated as user: Administrator@BIGON.BE
 * Looked up short domain name: BIGON
 * Using fully qualified name: fornost
 * Using domain name: bigon.be
 * Using computer account name: FORNOST
 * Using domain realm: bigon.be
 * Enrolling computer account name calculated from fqdn: FORNOST
 * Generated 120 character computer password
 * Using keytab: FILE:/etc/krb5.keytab
 * Using fully qualified name: fornost
 * Using domain name: bigon.be
 * Using computer account name: FORNOST
 * Using domain realm: bigon.be
 * Looked up short domain name: BIGON
 * Found computer account for FORNOST$ at: CN=fornost,CN=Computers,DC=bigon,DC=be
 * Set computer password
 * Retrieved kvno '7' for computer account in directory: CN=fornost,CN=Computers,DC=bigon,DC=be
 * Modifying computer account: userAccountControl
 * Modifying computer account: operatingSystemVersion, operatingSystemServicePack
 * Modifying computer account: userPrincipalName
 ! Couldn't set service principals on computer account CN=fornost,CN=Computers,DC=bigon,DC=be: 00002083: AtrErr: DSID-031510BA, #1:
	0: 00002083: DSID-031510BA, problem 1006 (ATT_OR_VALUE_EXISTS), data 0, Att 90303 (servicePrincipalName)

 * Discovered which keytab salt to use
 * Added the entries to the keytab: FORNOST$@BIGON.BE: FILE:/etc/krb5.keytab
 * Added the entries to the keytab: HOST/FORNOST@BIGON.BE: FILE:/etc/krb5.keytab
 * Added the entries to the keytab: HOST/fornost@BIGON.BE: FILE:/etc/krb5.keytab
 * Added the entries to the keytab: RestrictedKrbHost/FORNOST@BIGON.BE: FILE:/etc/krb5.keytab
 * Added the entries to the keytab: RestrictedKrbHost/fornost@BIGON.BE: FILE:/etc/krb5.keytab