The India Dynamics CRM Team Blog has published a blog post with two useful video walk-throughs on how to use two of the most important tools for customers about to upgrade to CRM 2013:

  • Microsoft Dynamics CRM 2013 Custom Code Validation Tool - designed to scan client side scripts (onLoad, onChange, onSave events) to detect code pieces using unsupported methods
  • Legacy Feature Check Tool - designed for CRM On-premise customers to scan a CRM 2011 organization for unsupported customization on server side

See more here