This Knowledgebase article provides information about Windows Server 2012 not retaining Windows Server Activation after installing Neverfail IT Continuity Engine v7.0
After installation of Neverfail IT Continuity Engine v7.0 on the Secondary (cloned) server, the user is prompted to activate the Windows Server 2012 operating system.
As a result of the cloning process on Windows Server 2012, Windows Server Activation may not be retained.
Reactivate the Secondary cloned server after completion of installation.
Neverfail IT Continuity Engine v7.0