Wizard is installed with GRE to ensure that all users have the ability to mount (WRITABLE) and dismount Shadow Protect images and access EDB files.To restore items directly to an Exchange environment you must have the proper Exchange system/domain rights.Over the years I have seen so many approaches to migrating Windows file server shares to new servers.Most methods are valid and some are down right brilliant uses of native tools.The underlying protocols are mature and simply work.
You must add one GRE product key per Exchange server.
Plus, most of these tools are a pain to operate or have complex interfaces. Also, the official Microsoft stance is that it only supports 2003-2008r2 server.
That is where the File Server Migration Toolkit comes in. True that is does not officially support 2012 or 2012r2, however, it does work the same for both.
Copying files between computers has long been a common system administration task.
In the Windows world this has usually been a no-brainer.