I have customer that is migrating to a new unity 4.0.5 from unity 3.X running in a ICS 7750. It was decided to go ahead and proceed with a new fresh install versus a migration from the old Unity to the new Unity, all the information will be new. However, the AD enviroment is the same, they have a single forest but separate domains. The installation guide calls to run the AdSchema and permissions wizard for the new Unity, plus creating the required system accounts (UnityInstall etc), However, the customer wants to make sure this step is required for the new hardware appliance unity. Do I need to revert the AD updates that were done when the old Unity was installed or it will be OK to run the ADschema and Permissions wizard again to include this new unity in the AD enviroment.