I have an Office 365 email account, and have for many years. I have over time moved over subfiles into Archive. They go to the end of my file list, but my Sane Box folders end up behind even them. I tried to delete most of the oldest in order to shorten the list as it appears in Mail on my iPads and iPhone. But, despite the fact the files are empty and no longer show up on my Mac, I can’t figure out how to get rid of these empty folders in IOS. I deleted the account on one of my iPads, replaced it, and the same empty files were there. If anyone has any advice on how to get rid of these things, I’d be very grateful.