This is the current, expected behaviour and is why the nag/confirm tells you, it is permanent and cannot be un-done.

Thanks Brian, perhaps I should say 'feature' rather than bug :-) Although it does warn it seems counter-intuitive behaviour when we have the 'Deleted Items' folder and the user is not specifically performing a hard-delete.

 

I have changed the thread from a 'problem' to 'proposed' so hopefully it will receive some consideration from SmarterTools.