We are trying to exclude the field data from masking where type is undefined, let us know what where condition we can use in the Portal.
{ $exists: true, $not: { $type: "undefined" } }
Field name: <Top-Level-Field>.extSysResourceDetails.<Specific-Field>
All supported TDM releases.
MongoDB database.
Such types of WHERE conditions are not supported in FDM. Only MongoDB document properties are supported for comparison, not meta-properties