Summary
There are many confusions regarding the terminology on these two meanings ,this document explains what are the real meaning of these terminologies.
Question
This document indicates the real definition of these terminolgies and then the administrator can you use the correct manage status.
1-Not Manage
2-Out of service.
Answer
Not Managed – Indicates the node is intentionally not managed. For example, the node might not be accessible because it is in a private network. NNMi does not update discovery information or monitor these nodes.
Out of Service – Indicates a node is unavailable because it is out of service. NNMi does not update discovery information or monitor these nodes.
You can find more details in the followign document http://support.microfocus.com/kb/kmdoc.php?id=KM00392971