VMs not Monitored

Hello,

I am using Veeam Management Pack 6.5.0.1549 and apparently I have about 50 VMs (from 677 Total) which remain not monitored.

They are on different subnest already used by other VMs, they have different OS s already used on other VMs, they have different VM version already used by other VMs, their host are multiple and working VMs are using the same , ... I could not find a pattern...

How to trace this issue?

Thanks,
Dom

System Center Operations Manager 2007 / System Center Configuration Manager 2007 R2 / Forefront Client Security / Forefront Identity Manager