Network Field Mappings show as Not Validated after running Network Mapping Validation.
Network Field Mapping records are not assigned the correct Record Type.
Each Network Field Mapping record requires a Record Type to be assigned specific to the types of fields that are mapped. If the Network Field Mapping record is edited through the UI and Saved, the correct Record Type is assigned.
When data loading Network Field Mapping records, be sure to assign the appropriate Record Type, as it is not automatically written when records are data loaded.
CRM Help Documentation: Network Field Mapping