Windows Server 2012 / Windows Server 2008 R2Exchange Best Practices Analyzer error message:
Title: All OUs in this domain should be protected from accidental deletion
Problem: Some organizational units (OUs) in this domain are not protected from accidental deletion.
Impact: If all OUs in your Active Directory domains are not protected from accidental deletion, your Active Directory environment can experience disruptions that might be caused by accidental bulk deletion of objects.
Make sure that all OUs in this domain are protected from accidental deletionSolution:
Go to Start > run, type dsa.msc and click OK.
Directory Users and Computers (AD DS) window shows.
Right click the OU that you want to protect from accidental deletion, and click Properties
Click "object" tab, check "Protect object from accidental deletion" and click "ok" to save