Hello,
When attempting to add my 365 account to Onenote on my android phone I receive a "Office 365 sign-in failed due to network error".
Sign-in and sync currently works on my iPad, and a co-workers iPhone.
My company has a site on 365 from which we connect to share Notebooks.
I have tried re-installing the Onenote app on the phone. Sync of the notebooks works on the web app, Onenote on windows, and Apple devices.
My personal OneDrive syncs correctly.
Thanks,
Derek