If you have the notebook open, it will stay in read-only mode until the administrator turns off read-only mode.
If you do not have the notebook open, you may be unable to open it while the site is in read-only mode. We recommend that you ask your administrator to turn off read-only mode. However, if this is not an option, you can follow these steps to work around the issue.
Note This workaround is intended only for users who cannot open the notebook by using OneNote. The workaround lets users access the notebook temporarily. The temporary copy of the notebook cannot receive changes from other users.
- Open the SharePoint site, and then open the library that contains the notebook.
- In the Connect & Export area on the LIBRARY tab, click Open with Explorer.
- Copy the notebook folder that contains the section files to the local computer, and then open the section files by using OneNote.