An external object ID, if any, in some other system/repository/vault. Externality is seen quite widely, external to the object ID specified by objid. Useful e.g. when the objid member represents an unmanaged object ID because then objidExternal can represent the managed ID of the corresponding object in the vault.
GetNextObjectsForMIXResponse.objects -- The ID information of the objects for metadata indexing. If an empty array is returned, no more objects are available.