To free up space in the Online Archive (OA) and comply to GDPR . It would be good to delete not only by "age" the data in an OA, but also by a customize query, similar like the option the data is transferred to the OA from a collection. (A custom query. Atlas runs the query specified in the archiving rule to select the documents to archive. - https://www.mongodb.com/docs/atlas/online-archive/manage-online-archive/)