onenote-webhooks-events

# OneNote — Change Detection (Polling & Delta Queries) ## Overview > **OneNote webhooks were decommissioned June 16, 2023.** The Graph subscription API (`POST /subscriptions` with `changeType: "updated"` on OneNote resources) returns `400 Bad Request`. Unlike Outlook mail, calendar, and OneDrive — which still support push notifications — OneNote has no webhook replacement. You must poll. This skill implements efficient change detection for OneNote using `lastModifiedDateTime` comparisons, delta query patterns, and rate-limit-aware polling intervals. The approach balances freshness (detecting changes within minutes) against the 600 requests/minute per-user rate limit. Key pain points addressed: - Subscription API for OneNote resources returns `400` — do not attempt it - Delta queries (`/me/onenote/pages/delta`) are not officially documented but work on some tenants - Polling must stay within rate budget (600/min per user, 10,000/10min per tenant) - Change detection requires comparing timestamps, not content diffs (output HTML is unstable) ## Prerequisites - Azure app registration with delegated permissions: `Notes.Read` or `Notes.ReadWrite` - App-only auth deprecated March 31, 2025 — use delegated auth only - Python: `pip install msgraph-sdk azure-identity` - Node/TypeScript: `npm install @microsoft/microsoft-graph-client @azure/identity @azure/msal-node` - A persistent store for tracking last-seen timestamps (Redis, SQLite, file system) ## Instructions ### Step 1 — Un...