I've been trying to gain access to onenote on my andriod devices and it continues to pop up this alert:
Please finish setting up your work or school accont to access your notebooks. Tap here to continue, or ask your administrator for help
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TRY AGAINSWITCH ACCOUNT
My license is still valid as i have only just received it via my university. I haven't been able to test it on any other devices due to only owning androids. I have access to all other microsoft applications and i cannot find any warnings regarding my account.
If your account is being used for the first time. It could be that your account has just been created and it needs to be initialized. You can initialize it by logging in Office.com with your browser. The initialization time can take 1 to 2 days. Once you're done initializing, you're ready to create a OneNote notebook.