Class Notebook Transfer Nightmare

This is the first year we've had teachers leave that need their class notebooks transferred to a new teacher, and now that there is a new online tool for this I thought it was going to be really straight forward. Unfortunately it wasn't.

Every single notebook failed. Working with Microsoft Support on this, who have been very helpful, the cause of the issue has been identified to the sections being too large. The limit is 250MB per section. I have been advised to split one of the sections down and retry.

There are some fundamental issues with this. First of all I need to log in as that user, and find that section, which is proving tricky in itself. But this only solves it for this one notebook. This teacher has 25 notebooks, and the only way of knowing which section is too large is by sending the failing correlation id for each notebook to Microsoft for them to analyse their logs.

I'm very puzzled to the low limit on sections. OneNote has no restrictions that I am aware of regarding sections. However there is a 250MB on embedded files. The users have plenty of OneDrive space, so storage is not an issue.

I understand Teams resolves this issue, which is what teachers are slowly moving over to. But there has to be a better resolution to the above issue. The best solution would be to be able to transfer notebooks into a team, and therefore remove the relationship to any one user's OneDrive.