This page seems to indicate it's supported that way: http://www.microsoft.com/windowsserver2008/en/us/migration-paths.aspx But my general thought (despite being a complete PITA) is to do a fresh install. Jon Galbreath MCSE/Security+ Systems Administrator International Studies and Programs Ph: 517-884-2144 [log in to unmask]<mailto:[log in to unmask]> From: MSU Network Administrators Group [mailto:[log in to unmask]] On Behalf Of Ehren Benson Sent: Wednesday, October 07, 2009 11:28 AM To: [log in to unmask] Subject: [MSUNAG] Server 2008 to R2 Does anyone know if you can just "install" R2 to Server 2008 as you could with Server 2003 R2 or if you have to do a wipe/reinstall? Ehren J. Benson, MCSE Windows Systems Administrator Department of Physics and Astronomy Michigan State University 1209 A Biomed Phys Sci [log in to unmask]<mailto:[log in to unmask]> 517-884-5469