There is nothing scarier to an Active Directory administrator than the thought of someone attacking the domain controllers. The majority of attacks come from within the internal network and come from existing domain users.
Understanding Internal and External Trusts in Active Directory
You Can Learn More About the ManageEngine Product Line By Going to manageengine.optrics.com The original article/video can be found at Understanding Internal and External Trusts in Active Directory
Find and Delete “Never Used” User Accounts
Every Active Directory installation has one common issue. Every installation has one or more users that were created for a project, new employee, returning employee, and the like; but the user account was never used