Have a log of who made changes to servers

Hi

Running zenoss core 4.2.4, I have a desire to be able to trace back who has made changes to any given servers and at which time. I have been looking through the web-interface as well as the zendmd, but I cannot find any trace of how I may do this.

In particular it would be nice to know who has changed the productionstate of a device, and preferably also from and to states. We use productionstate to decide whether or not we should wake up somebody when a service fails, so we really would like to trace back any changes to productionstate (and possibly other things).

I have tried to enable user-logging in Z2.log, but apparently Z2.log doesn't really log changes to productionstate.

Is this possible I don't mind having to do some extra stuff to get it working, I'd prefer that I can get the modifications logged into a file.

Hope that somebody can help.

Kind Regards
Thomas