When creating WMI filters you may get the following warnings on Windows Server 2012 R2 (possibly other versions as well).
” Either the namespace entered is not a valid namespace on the local computer or you do not have access to this namespace on this computer. It is possible this is a valid namespace on the remote computer(s). If you wish to use this namespace, press OK. Press cancel to choose another namespace. “
After a lot of research and testing it seems like this can be ignored. Providing your WMI query is valid the WMI filter still applies, at least from the testing I’ve done. At this stage I’m treating this as a bug. I’d welcome comments by anyone who has an explanation.