Upgrading from VMM 2012 SP1 to VMM 2012 R2

To upgrade to VMM 2012 R2, you should already be running VMM 2012 SP1. VMM 2012 R2 requires a Windows Server 2012 as minimum OS (Windows 2012 R2 recommended) and Windows ADK 8.1. If planning an in-place upgrade, back up the VMM database, uninstall VMM 2012 SP1 and App Controller, retaining the database, perform an OS upgrade, and then install VMM 2012 R2 and App Controller (optional).