Updated April 18, 2025: We have updated the content. Thank you for your patience.

In 2018, we announced that we were no longer making feature updates to Exchange Web Services (EWS) in Exchange Online, and we advised developers to move to Microsoft Graph.

In September 2023, we announced that on October 1, 2026, we will start blocking EWS requests to Exchange Online.

We are now less than 18 months from October 1, 2026. We have made progress on closing several parity gaps with more changes in development to be released in the coming quarters. Please refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information.  

If you haven't already, start the process of working with your application development organization and your application vendors to migrate active EWS applications on your tenant to the Graph API.