As an App Volumes administrator, you can choose to connect to Active Directory over a secure or insecure LDAP connection.
Secure LDAP (LDAPs) - Connect to Active Directory over a dedicated LDAPs port. The default port number for LDAPs is 636. The user must have downloaded a CA root certificate of the domain. App Volumes uses this certificate to trust the connection.
LDAP over TLS - Connect to Active Directory over TLS. The default port number for LDAP is 389. The user must have downloaded a CA certificate of the domain, App Volumes uses this certificate to trust the connection.
LDAP (insecure) - Connect to Active Directory over an insecure connection over plain LDAP.
Note:The initial binding however, occurs over GSS-SPNEGO.