I have over 2 million records stored in my Individual Email Results object (created by Marketing Cloud Connector) which I would like to remove. I have tried using the Tracking Data Cleanup Tool in the Switchboard but it only returns 3 records, when I press "Delete All" it only deletes those three records it mentioned.
Can I simply wipe out the data using Data Loader (extract and then delete)?
and secondly why weren't the rest of my records be deleted?
(The only thing I can think of that may affect this is that I have upgrade the connector twice this year)