All these methods are available in LDAP authentication.
Here are the definitions.
Encrypted password (md5)
Plain text password + SSL (TLS)
The entire authentication procedure (password included) is encrypted. The secure port 636 must not be used in this mode: Adobe Campaign automatically switches to secure mode.
When you use this authentication mode, in Linux, the certificate is verified by an openLDAP client library. We recommend using a valid SSL certificate so that the authentication procedure is encrypted. Otherwise, information will be in plain text.
The certificate is also verified in Windows.
Windows NT LAN Manager (NTLM)
Proprietary Windows authentication. TheUnique identifieris used for the domain name only.
Distributed Password Authentication (DPA)
Proprietary Windows authentication. TheUnique identifieris used for the domain name only (domain.com).