Restore OU-tree from AD Recycle Bin with PowerShell
[TL;DR: I’ve written a script to bulk restore objects from Active Directory Recycle Bin, it is available on TechNet Galleries]
Active Directory Recycle Bin The Active Directory Recycle Bin is a nifty feature introduced with Windows Server 2008 R2 and makes it possible to undo an accidental deletion of an Active Directory object. This means that if the Active Directory Recycle Bin is enabled, all link-valued and non-link-valued attributes of a deleted object are preserved and the object can be restored in its entirety.