Take care when adding passwords to your notebook sections and when changing them.
If you forget any of your section passwords, no one will be able to unlock those notes for you (not even Microsoft Technical Support). OneNote uses encryption to secure password-protected sections. Make sure that the Caps Lock key is off before you add or enter a password. Passwords can be applied only to notebook sections, not to entire notebooks. In the Remove Password window, type the current password, and then press Enter. (If this option isn’t available, it means that the current section doesn’t have a password.) Right-click the name of any protected (but currently unlocked) notebook section whose password you want to remove, and then choose Password Protection > Remove Password. Remove the password from a protected section
To change the passwords for other protected sections in your notebook, follow the preceding steps for each protected section. Note: Changing a password only affects the section that you’re currently in.
