1. A method for distributing a security policy change within a security system distributed over a computer network, the computer network having at least a server machine and a plurality of user computers, said method comprising: (a) receiving a security policy change at a server machine of the computer network; (b) determining those one or more users that are affected by the security policy change; (c) preparing a security policy change message for the one or more users that are determined to be affected by the security policy change; (d) delivering the one or more security policy change messages to the user computers associated with the affected users who are logged into the system in such a manner as to be able to receive the security policy change message, and (e) caching the security policy changing messages for users not logged into the system in such a manner so as to be able to receive the security policy change messages.