<div>
That doesn't explain how to do the upgrade. &nbsp;Do you have a link to do the actual in place upgrade?
</div>


That doesn't explain how to do the upgrade.  Do you have a link to do the actual in place upgrade?

<div>
Thank you very much for your help
</div>


<div>
<div class="content wysiwyg-content">
I have a client that has windows server 2008(non r2) 64 bit. &nbsp;They need to be able to work with more memory since they are using hyper-v. &nbsp;So, we need to upgrade to 2008r2 enterprise. &nbsp;If I just buy the 2008r2 enterprise retail or OEM license, how do I accomplish this upgrade the easiest way? &nbsp;Also, they currently have 25 cals for the 2008 server. &nbsp;Will these cals still be legal for the 2008r2 enterprise server? &nbsp;Thanks for all your help.
</div>
</div>


I have a client that has windows server 2008(non r2) 64 bit.  They need to be able to work with more memory since they are using hyper-v.  So, we need to upgrade to 2008r2 enterprise.  If I just buy the 2008r2 enterprise retail or OEM license, how do I accomplish this upgrade the easiest way?  Also, they currently have 25 cals for the 2008 server.  Will these cals still be legal for the 2008r2 enterprise server?  Thanks for all your help.

Upgrade windows server 2008 to server 2008r2 enterprise

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.

Windows Server 2008

The Microsoft Server topic includes all of the legacy versions of the operating system, including the Windows NT 3.1, NT 3.5, NT 4.0 and Windows 2000 and Windows Home Server versions.