Retirement of Exchange Web Services in Exchange Online September 19, 2023 Sep 19, 2023 09/19/23 Greg Taylor On October 1, 2026, we will start blocking EWS requests from non-Microsoft apps to Exchange Online.
Restricted access to Microsoft Teams data via EWS starts January 31, 2023 July 12, 2022 Jul 12, 2022 07/12/22 Microsoft Teams team Microsoft will start restricting access via EWS to Microsoft Teams message data starting on September 30th, 2022. Fully supported access to Teams message data is available through the Microsoft Graph Teams Export API.