Raise Active Directory level to Windows 2008 R2
Click Start, click Administrative Tools, right-click Active Directory Module for Windows PowerShell, and then click Run as administrator
In AD powershell ( as administrator ) : Set-ADForestMode –Identity domain.local -ForestMode Windows2008R2Forest

Enable the recycle Bin
 AD powershell ( as administrator ) : Enable-ADOptionalFeature –Identity ‘CN=Recycle Bin Feature,CN=Optional Features,CN=Directory Service,CN=Windows NT,CN=Services,CN=Configuration, DC=domain,DC=local’ –Scope ForestOrConfigurationSet –Target ‘domain.local’