We recently had a total data loss from a Unity due to a faulty raid drive - so the Unity disappeared from the network. [Unity 3.13/windows 2k AD/exchange2k] The Unity had exchange installed on it and there are other exchange servers on the network. We would just like to verify the proper proceedures for removing all references to the Unity from the network [In AD/Exchange] before reloading a system from scratch. We are up and running now, but would like to research this further in case it ever happens again. Thanks.