Microsoft Exchange Online will enable admins to assign the SMTP.SendAsApp role to applications via App RBAC, allowing group-based or scoped mailbox access. This replaces manual per-mailbox permissions, simplifying OAuth SMTP client onboarding. Rollout begins November 2025, with no end-user impact. Prepare by planning group-based access and updating documentation.
Applies to: Exchange Online · Microsoft 365 suite
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).