[This is preliminary documentation and subject to change.]
The __AuthenticationData system class is used to express the specific data a particular security authentication scheme, such as the Microsoft® Windows NT® LAN Manager authentication protocol.
In general, this class acts as a superclass and is not used directly. Each subclass contains data private to the particular authentication scheme, such as a password digest, a domain name, or other system-specific data. This class is only available in the Root\Security namespace.
class __AuthenticationData : __SecurityRelatedClass
{
string Authenticator;
[key] string GUID;
};