OneNote Common Errors Overview A complete error decoder for the OneNote Graph API. Each HTTP status code has multiple possible root causes — this skill maps every cause, provides diagnostic steps, and gives fix-it code. Special attention to the two trickiest errors: 403 (which could mean wrong permissions OR deprecated app-only auth) and 200 with empty body (silent upload failure that causes data loss). Prerequisites - A OneNote Graph API integration that is returning errors - Access to application logs or the ability to add logging - Familiarity with the Graph API request/response format Ins…