The Microsoft Assessment and Planning Toolkit (MAP) performs a detailed analysis of hardware and device compatibility for migration to Windows Server 2008, Microsoft Office 2007, Microsoft Application Virtualization, and Windows Vista. The hardware assessment looks at the installed hardware and determines if migration is recommended. If it is not recommended then the reports tell you why it is not.
In addition, MAP has expanded its capabilities into assessment areas of Hyper-V server virtualization, desktop security, and SQL Server 2008 migration.
Source: http://technet.microsoft.com/en-us/library/bb977556.aspx
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