Exchange Online Moves Closer to Dumping EWS

Microsoft is introducing a Dedicated Exchange Hybrid App to facilitate the transition away from EWS to use Graph API requests for rich hybrid coexistence (free/busy, Mail Tips, and user photos). The plan involves the creation of an Entra ID app to hold EWS permissions (stage 1) followed by Graph permissions (stage 2). Everything has to be complete by October 1, 2026, because that’s when EWS goes away.