I got this question about the FlushTokenCache documentation. It says that the documentation is ambiguous... but I think the question itself is the ambiguous one. ;-)
Is it possible to provide some information on FlushTokenCache?
Have refered this but it's not sufficient to proceed further...ms-help://MS.TechNet.2005APR.1033/iis60proddocs/sec_auth_basicauth_tokencache.htm
I presume you are referring to the following URL: Configuring Token Cache for Basic Authentication
It is not clear what "information" you are looking for, so I am just going to give the basics.
For Basic Authentication, IIS will cache user tokens of authenticated users for performance reasons (think about the domain scenario - you do not want every single request to IIS requiring an access against the Domain Controller on the backend...). However, as soon as you cache user tokens you need to worry about replay/spoofing attacks against the cached user token, and a reasonable defense against this security threat is to periodically flush the user token cache.