>the baseline is to use a time control, to either a) kick then off after x amount of minutes of non use, or b) at a certin time of the day. In either of these cases the data and application can close down correctly, if an administrator kicks people off (depending on your set up) it could corrupt your tables. You will still have problems with either case, as in case a) use gets pulled away from there system for something else. Case b) users working late

How would you implement example a as above. How do you check for non-use?