Article ID: 2795033
When looking at the properties of a System Center 2012 Virtual Machine Manager (VMM) Service Pack 1 Library server on a Highly Available Library File Server, not all nodes show up in the Agent Status as responding. It may also indicate that "This node is not being managed by VMM" which is incorrect.
This is a known issue with System Center 2012 Virtual Machine Manager SP1.
(http://go.microsoft.com/fwlink/?LinkId=151500)for other considerations.