A question which is sometimes asked by customers is whether or not the facility exists to script the restoring of many archives back to their Exchange mailboxes. The answer is that at this time there isn’t a way to do this. There is no command line interface in to the Export Archive functionality.
Another thing to be wary of is that by restoring many, many archives back to mailboxes you will be putting pressure on both the Enterprise Vault infrastructure and the Exchange infrastructure. Performing an operation such as this should be done with much careful planning.
Mileage may vary, but I suppose it is possible to do this to some extent using AutoHotkey, but I’ve not seen any sample scripts.