My Google-fu is failing me today. I would like to blame the bad office coffee, the fact that it is a Monday, and the lack of information online...but maybe it is my fault. Either way, I hope that you can help:
Can the IPAM role on Windows Server 2012 R2 discover and manage WS2008R2 DHCP clusters, or can it only manage standalone DHCP servers?
If it can manage DHCP clusters, should I have the IPAM service discover the cluster service name, or the individual DHCP cluster nodes?
Apparently IPAM is looking at the operatingSystem attribute on the server's computer account in Active Directory in order to find out whether it is running a supported OS.
In order for Windows Server 2012 IPAM to discover and manage a Windows Server DHCP cluster, you have to open the properties for the AD computer account of the cluster service name, go to the Attribute Editor tab, and edit the operatingSystem, operatingSystemVersion, and operatingSystemServicePack attributes to reflect what the DHCP cluster node servers are running.