Users may want to change the constant string.
In my Windows2003/2008 environment, that does not work unless setting "simple".
Crawler-ui should allow users to the change authentication.
Direciton of improvement(at this time):
Crawler-ui allows users to input AUTHENTICATION text value.
ActiveDirectoryAuthority support "none", "simple" and the authentication mechanism for the provider to use.
ActiveDirectoryAuthority does not support "strong", SASL authentication and SSL protocol.