I'm not going to go through that on every device I use. The W10 version claims to be able to open many at once, but it doesn't show all my notebooks (no, this isn't a user account problem - I only have one, and I can see all my notebooks on - it just plain doesn't work for more than about 15 notebooks).

On W7 (Onenote 2016) and Android, these have to be opened ONE-AT-A-TEDIOUS-TIME! On every device.

The ugly surprise is that it appears you have to 'open' EVERY NOTEBOOK ON EVERY DEVICE to get access to it! I have, like 50 notebooks in EN, about 40 of which I moved over. I don't see why the converter can't do this for me (it's a trivial algorithm), but, still, I knew this going in. I knew once I got things over to Onenote (using the MS conversion tool), I'd have to move things around to get my organization back. I organized everything on the EN side first (because moving things around is drag-and-drop in EN, and a royal-pain-in-the-**** in Onenote). I posted this to, but haven't gotten much back:

Microsoft onenote evernote importer