Attio to Microsoft 365 integration — real-time, two-way sync

Yes. Stacksync provides a managed, real-time two-way integration between Attio and Microsoft 365: authenticate both systems, choose the objects to sync (such as Attio's Companies and Users), map fields visually, and changes propagate both ways in milliseconds — no code required.

On the Microsoft 365 side: Teams, Planner & To Do Tasks, Users, Groups, plus custom fields where Microsoft 365 exposes them. On the Attio side: People, Companies, Users, Deals. Stacksync auto-detects both schemas and converts types between the two systems.

Yes. Each object mapping can be bidirectional or restricted to a single direction (both systems accept writes). Read-only mirrors, one-way pushes, and full two-way sync can be mixed in the same integration.

Common patterns for Attio and Microsoft 365: Where Microsoft 365 supplies contact or company data; Where Microsoft 365 processes payments; Where Microsoft 365 can store CRM context: fields kept current. Enriched fields land directly on records in Attio, and refreshes keep them from going stale.

Attio: REST API. Authentication: Guided in-app connection ("Attio CRM" connection created in a few clicks, "without any coding required"); the docs do not name the underlying auth mechanism (OAuth vs API key). Microsoft 365: REST API (Microsoft Graph). Authentication: OAuth 2.0 via Microsoft Entra ID, with delegated or application permissions. Stacksync manages authentication, retries, and rate limits on both sides.

Microsoft 365: Delta queries return only resources changed since the last sync token, which keeps incremental syncs cheap on large tenants. Attio: Docs do not document the authentication mechanism, change-detection method, or write/CDC/webhook behavior for Attio. Stacksync's field mapping accounts for these differences between Attio and Microsoft 365 without custom code.