check before: 2023-10-06
Exchange, Microsoft 365 Apps, Microsoft Graph, Outlook, Teams
Developer, Mac, Online, Web, World tenant
Admin impact, Retirement
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.
Today, we are announcing that on October 1, 2026, we will start blocking EWS requests from non-Microsoft apps to Exchange Online.
[When this will happen:]
October 1, 2026
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