We had a template that was incorrectly specifying Windows 2008 R2 64 bit instead of the correct version (Windows 2012 64 bit). There have been a few 2012 virtual machines deployed with it and it appears I can change it with the guest operating system pull down menu within the vmware client (edit settings of the vm). My questions are what is the difference when deploying using 2008 R2 and 2012? Can I simply change the pull down to correct it? Should I even worry about it? So far, regular servers seem fine, however I am now having weird domain controller issues so wasn't sure if it could be related.