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3.4. Remove account from OneNote for Windows 10

1. Open OneNote.

2. Click the Settings and More (three-dotted) button in the top right.

3. Click on Settings.

4. Click on Accounts.

    

   

5. Select the account and click the Sign out option.

    

   

Source: https://pureinfotech.com/add-notebooks-multiple-accounts-onenote/