This video is Part 1 in a 4 part video series on the steps required to upgrade an existing PKI from Windows Server 2003 to Windows Server 2012.  Although the steps demonstrated cover upgrading Windows Server 2003, the same steps could be used to upgrade Windows Server 2008 or Windows Server 2008 R2 to Windows Server 2012.  This video covers the steps to backup an existing Root CA, which is the first step in the migration.

If you have any issues with viewing the video on this website, it can also be viewed here: http://www.youtube.com/watch?v=wdyCPF3gOJc