About ADS

I have one domain controllor and one file server. For Example:- when user type in run menu \\fileserver then he saw all sharing folder but i want to that he can nor saw that folder which is not for him. some folder is not for him but he can saw all. i have giving permission. and he does not access it. but i want to only user is see that folder which is accessible for him. please send me answer of this question on my email id panchmaa007@gmail.com