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There are two Direct Access deployment scenarios, one giving full access from connected PCs to select network resources, the other allowing you to manage connected PCs — making sure that mobile users' PCs are always up to date.
Along with Windows 8, Windows Server 2012 gets a new, faster file copy — with a graphical view of file transfer speeds.
Hyper-V brings a new and more resilient virtual hard disk format, VHDX. You can use the Edit Virtual Hard Disk tools to upgrade to the new format — but remember to merge snapshots first.