KB936838 After a System Center Operations Manager 2007 agent sends discovery data to a management group, no rules are deployed for monitoring in later management groups has been released http://support.microsoft.com/kb/936838/en-us

This discusses an issue when an Operations Manager 2007 agent is multihomed to multiple management groups and failing to send discovery data, therefore unable to receive rules from that management group. A hotfix is available to correct this issue.

 

The hotfix may be requested via online submission via http://support.microsoft.com/kb/937470/en-us