Is there any way to monitor a Windows Cluster?

2 minutes ago, Kelemvor said:

LM can't monitor clusters with more than one active node so there's nothing we can do

Sounds like the support guy taking the easy answer. Or, their answer was, "it doesn't do it out of the box and support is not pro services, so I can't build that for you," which also doesn't solve your problem.

These could be limitations of the OOTB datasources, in which case, someone will need to build new ones.