I want to know what the difference is between the share permissions and the security tab on windows 2000 server. I am trying to give users access to a program on an app server. I gave full access to groups under the security tab, but the vendor tells me I need to give full access to the Everyone group which I do not want to do. Do I need to put them in the share permissions tab also? Or will this override the security tab? Any help given would be greatly appreciate to clarify this situation.