In Network Node Manager (NNMi), we can see nms-disco.properties file in the two places:
but these two places have different role for property files.
for NnmInstallDir/misc/nnm/props/ directory, the customer should never change configuration
parameters in NnmInstallDir/misc/nnm/props - in fact they should never be aware that this directory even exists.
These files will get overwritten with each new NNMi product release.