STEP 1:
1. In OneNote, choose File > New and select the new folder location in OneDrive or SharePoint, where you want your existing notebook to be moved to.
2. Enter a name for the notebook and choose Create.
3. Note: After choosing Create, you may be prompted to share the new notebook with other people by inviting them. You can send an email invitation to the new location now by choosing Invite people or leave this until Step 3 by choosing Not now. People receiving the invitation now will not be able to see the old notebook sections in the new location until you have completed Step 2.
STEP2:
1. In the old notebook, right-click a section tab and choose Move or Copy.
2. Choose the new notebook from the list of notebooks, and choose Move.
3. Repeat steps 1 and 2 until all the sections are in the new notebook. There is currently no way to select and move multiple sections at once.
4. Press Shift+F9 on your keyboard to manually sync all notebooks and wait for the synchronization to finish. If you're using a touch device without an external keyboard, use the Shared Notebook Synchronization status viewer to initiate a sync. . For more info, see View the synchronization status of shared notebooks.
When OneNote is done syncing the changes, the moved sections will be visible to everyone when they open the new notebook location.
STEP3:
OneNote cannot update the notebook location for people you have shared it with. There are two ways you can notify them of the new notebook location:
In the original notebook, create a new section with a page containing a link to the new notebook, advising people to open it.
Send a Share invitation email from the new notebook. For info about how to generate a Share invitation email
Note: Once you are certain that everyone is accessing the notebook from the new location, the old notebook file can be permanently deleted.