Microsoft Knowledge Base Article 898075 Describes how an issue where the Disk Quota console shows two or more entries for the same user after you upgrade from a Windows NT 4.0 domain to an Active Directory domain:
During over 6 hours of training you can join John Savill from your computer as he will walk you through the key components and capabilities of System Center 2012, what’s involved in using the components, and the benefit they can bring to your environment.
May 2013 - The NameTranslate object is useful when you need to translate Active Directory object names between different formats, but it's awkward to use from PowerShell. Here's a PowerShell script that eliminates the awkwardness.