I can't login to OneNote for Android at present. The popped-up message just said "Unable to login, please try again later", and requested me to send feedback to Microsoft, while I was trying to login to my OneNote of my school account countlessly. Even though I followed the instructions to send feedbacks, I still receive no reply. I have also tried to uninstall and reinstall the OneNote app countlessly, but it does not help.
As for your reference, OneDrive and Outlook app works perfectly on my Android device, with having the same school account logged in. I sincerely hope the company can help me solve the problem, and let me use OneNote across devices as perfectly and seamlessly as before. Thank you so much.
