Alert on Unknown Subnets with SCOM

I have an issue I am sure many have were network team adds a subnet but forgets to tell the AD or SCCM team so I would like to alert when AD detects an unknown subnet. Does anyone know of a way to do this?


That sounds a bit tricky. Do you have reverse lookupzones in your AD? In that case you could create a list of all networks there and compare them to the list under sites.

Get subnets:

And then you have to modifiy this a bit to get out the reverse zones from the AD.

Could you alert on NETLOGON 5807 events in the system log on DC’s?

Missing Subnets in AD Sites and Services and the Netlogon 5807 Error