Tag: Exchange Admin API

The Exchange Online Admin API is a REST API to help app developers move from their code from Exchange Web Services before the final deprecation of EWS in April 2027. The permissions originally defined for the API are changing to become less confusing. The change must happen before November 30, 2026. The change shouldn’t impact Microsoft 365 tenants too much as it’s likely that Microsoft posted it to make tenants aware when they discuss apps with developers.

Microsoft launched the preview of the Exchange Admin API on November 17. The new API is intended to close known feature gaps that exist in the Graph APIs and allow developers to migrate from EWS before Microsoft retires EWS in October 2026. Think of the Exchange Admin API as a discardable time-limited API that allows clients to submit cmdlets for processing. It’s certainly one way to approach the EWS problem!