It seems the administrators don't install the default Microsoft Core Infrastructure Server suite and I'm trying to build custom one that excludes the mandatory registry entry.

The default bundle shows Windows Server in it

but I'm not able to bring it up in the application pane for assignment.

I tried overriding the 2 known bundles that contained it but that didn't address the issue. I've asked around and not gotten an answer that makes sense to me.

Does anyone know why Windows Server Standard or Datacenter can be found in default bundles but not assignable to custom bundles? If I should be able to, any idea what I'm not doing correctly?