SCOM 2007 R2 : Powershell Get-monitoringobject

Hi ,

      Am trying to find the time at which the Agent server would have been discovered in SCOM 2007 R2 when a new role was added to it. Lets say a normal server(which was added to scom long back) was made as a HUB transport for Exchange just recently, Am trying to find the time when it got discovered as HUB transport server role in SCOM. Below is the what I have done till now to guess that discovery time.

get-monitoringclass -name "Microsoft.Exchange.2010.HubTransportRole" | get-monitoringObject | select Name, LastModified, StateLastModified, AvailabilityLastModified

So it gave me a result , which might give some idea but In the above script the StateLastModified & AvailabilityLastModified is understandable but LastModified is not clear. what does this date mean ?  Can I use this date as the date that it got discovered by the discovery class ?

If you have any other way of finding the date at which the server would have been discovered by this Hub transport class do let me know.

Thanks for your Time !

S.Arun Prasath HP ARDE TEAM