If You want to upgrade Your Domain Controller from Windows server 2008 R2 to Windows 8 server on a single machine this is not possible
I was trying to upgrade my Domain Controller for test from Windows server 2008 R2 to Windows 8 server using full installation but I receive error
This is not compatibility issue, this is not supported.
In next few days I will try to add Windows 8 server as additional domain controller, and then move FSMO roles to Windows 8 DC.
I will describe all of this on my blog
Currently I’m pretty confused with this. Why Microsoft is not supported old fashion way of upgrade? Because of DP version or something else is not compatible?
Dubravko Marak Blog 