OneNote API fails to get any notes from shared not

Question

As the developer, I'm able to GET (using PHP via the REST API) all notes from a notebook shared with a client. As you see, a search by me returns all 25 notes within the accessed section:

{ "@odata.context":"https://www.onenote.com/api/v1.0/$metadata#me/notes/sections('0-240BD74C83900C17%21128584')/pages(title,id,links,contentUrl)","@odata.count":25,"value":[ { ...

But logged in as my (duly authenticated) client (and using exactly the same code), we get 0 notes:

{ "@odata.context":"https://www.onenote.com/api/v1.0/$metadata#me/notes/sections('0-240BD74C83900C17%21128584')/pages(title,id,links,contentUrl)","@odata.count":0,"value":[
] }

What needs to be done for my client to get not just the section in the shared notebook but (more importantly!) the notes in that section?

Answer 1

First off apologies for the shared pages not being returned by the API. I've tracked the issue down to a regional incident in our partner service. (user impact is estimated to be <1% of the total active users).

Once the incident is resolved, you will see the shared pages being returned correctly.

In the meantime, as a temporary workaround adding the below header to your API request will return the shared pages.

FavorDataRecency: true