MC296195 – (Updated) Upcoming API Retirements in Exchange Web Services for Exchange Online

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check before: 2022-03-31


Exchange, Graph API


Developer, Online, Web, World tenant


Change type:

Admin impact, New feature, Retirement, Updated message, User impact



Updated March 04, 2022: We have updated the content below for clarity.
Today we are announcing the retirement of support for the 25 least used APIs of EWS for Exchange Online (as determined by the call volume into the service).
We are retiring support for these APIs as we begin the process of reducing the surface area of the EWS protocol for maintenance and security purposes.
In the coming months we will send Message Center posts to tenants we can see are using these low volume APIs.
Over the last few years, we have invested heavily in Microsoft Graph to enable developers to access the rich data available in Microsoft 365. Microsoft Graph, along with OAuth 2.0, provides increased security and seamless integration with other Microsoft cloud services.

[Key points]
Timing: Late March, 2022
Action: We strongly urge you and our ecosystem partners that access Exchange Online data to migrate to Microsoft Graph APIs.

Change Category:


Release Phase:



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