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What are the configuration steps I need to take to migrate my existing client nodes from an existing CHEF Server to a new CHEF Server? These are all Windows clients.
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What are some of the gotchas I need to know about when performing this migration?
Though it's a bit old, this post is still a great place to get started, and is definitely enough to walk you through the gotchas.
You could try the latest and greatest method of migration, Upgrade lab. This is a great way to ensure that both the latest server and latest client can encompass your automation.