We've got a fair few machines kicking about at Microsoft and as you can imagine deploying Windows Vista and Office 2007 is quite a task in itself. In fact, planning such a depoyment is a job in itself. If you're planning your Vista and Office 2007 rollout and you want to get some great insight into how we did it, then check out the Technical Whitepaper and IT Showcase video:
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Planning the Windows Vista Deployment at Microsoft
Microsoft IT facilitated the deployment of Windows Vista with careful pre-deployment planning (including establishing clear goals shared with other organizations, such as the Windows Development organization), end-user training, extensive application compatibility testing, and a variety of deployment paths for users to choose from.
Technical White Paper