Applies to ONTAP 9 Answer Starting with ONTAP 9.10.1, Windows Active Directory users will first undergo Kerberos authentication. Should this fail, NTLM authentication will be subsequently attempted. L...Applies to ONTAP 9 Answer Starting with ONTAP 9.10.1, Windows Active Directory users will first undergo Kerberos authentication. Should this fail, NTLM authentication will be subsequently attempted. LDAP Authentication for a cluster will utilize UNIX credentials stored in Windows Active Directory LDAP for administrative authentication. Additional Information Configure Active Directory domain controller access overview How to configure LDAP Authentication for Cluster (Admin) SVM