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You buy the appropriate CALs and document it. &nbsp;There is no setting in Windows you need to change.<br />
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(Why would you do a complete change? &nbsp;You can use both).
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I like this solution the best because I am a novice when it comes to the server environment. The link explained it quite well. &nbsp;thanks to everyone for input.<br />
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Ron
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I had to change a customers server from per user to per device. I returned the old key and need to install the new key. how do I change the server from per user to per device? <br />
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thanks,<br />
Ron
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I had to change a customers server from per user to per device. I returned the old key and need to install the new key. how do I change the server from per user to per device? 

thanks,
Ron

need to change from per user to per device on server 2008r2.

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.