UPDATE: I'm updating this article to also include a new Step-by-Step video and migration guide that was recently released by our Cluster team to provide guidance for using the Migrate a Cluster Wizard to migrate CLUSTERS of Hyper-V Server hosts from 2008 R2 to 2012, in addition to the other migration scenarios previously included in this article below.
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Recently, I was involved in a project that was migrating from Hyper-V Server 2008 R2 to Hyper-V Server 2012. Due to architectural changes involved in implementing the new features in Hyper-V Server 2012, a direct in-place upgrade is not possible. However, the across-the-wire migration process we used below was straight-forward and worked very well. A ton of work has been done by the product team on improving the virtual machine export/import process, and we definitely saw this area shine during our project. Here's the migration steps we used ...
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