ashish.uchil@tcs.com wrote:

> 1.When i delete an User from the Win 2 k DC,still squid does show like it
> is authenticating the User for some time.


http://www.squid-cache.org/Doc/FAQ/FAQ-23.html#ss23.3

> 2. Also when i change an user from one group to another ,squid realizes it
> only if i reload it.


Look at the ttl option to the external_acl directive to configure how long
Squid caches the results from a group helper.

Adam