I have noticed that when running the NCM > Configs > Config Archive > 'Export all configs to the Config-Archive directory now', it only appears to backup a portion of the Nodes that are in my inventory. I have verified in NCM that many of the nodes that are not listed do in fact have many configs listed under them, but for some reason they are not backed up.
Is there a setting or node configuration the prevents specific nodes from backing up when I export all configs or run a nightly job?