When you try to integrate System Center 2012 Virtual Machine Manager (VMM 2012 or VMM 2012 R2) with System Center 2012 Operations Manager (OpsMgr 2012 or OpsMgr 2012 R2), the operation fails and the following error is returned:
One or more of the Virtual Machine Manager objects monitored by Operations Manager could not be discovered. This might be caused by a missing or outdated version of the System Center Virtual Machine Manager management pack in Operations Manager.
You receive this error if more than one Virtual Machine Manager server is integrated with the same SCOM management group.
For all the details as well as a resolution please see the following: