File servers, in order to know which version of a file is newest, like snychronized time. When a workstation connects so the user can login it updates its internal time to that of the file server. It is then a good idea to have the file server regularly set (sync) its time with an authoritative source. Microsoft in Server 2003 makes this the default and uses an internet master. 2000 Server allows this but requires a little more setup on your end. Allowing users to set their own clocks will result in file conflicts. If they are not sharing files then it doesn’t matter, The date/time applet in control panel should allow user changes to the time (also right click on clock in system tray). Then you can disable time synchronization for individuals. Network records – login, logout, etc. – will still be saved with the file server timestamp.