According to this official document List thumbnails for a DriveItem, we can get OneDrive photo thumbnails by using this API.
When I sent a request to get a photo thumbnail from my OneDrive with Microsoft Graph API, server returned 200 and worked fine.
https://graph.microsoft.com/v1.0/users/{my user id}/drive/items/{my photo object id}/thumbnails
However while trying to get a photo thumbmail from other user's onedrive, the server returned 404 not found.
https://graph.microsoft.com/v1.0/users/{other user's id}/drive/items/{other user's photo id}/thumbnails
I really sure that the other user's photo exists and that the id is correct.
Am I doing something wrong or is there a restriction around accessing other users' OneDrive photos?