Forum Discussion
The Final Countdown to Remove EWS from Exchange Online Begins
Microsoft announced the dates leading to the final retirement of Exchange Web Services from Exchange Online. If all goes well, the EWS retirement in the cloud will happen by May 2027. Challenges still exist. Microsoft must remove EWS from its own apps, including Outlook, and help tenants and ISVs make the leap to Graph APIs. Plans are in place and progress is being made, but will everyone be ready when Microsoft starts to remove EWS permanently from Exchange Online in April 2027?
https://office365itpros.com/2026/02/06/ews-retirement-may-2027/
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One more gap for this list: Graph has no documented endpoint for the master category list of Microsoft 365 Group mailboxes (only /users/{id}/outlook/masterCategories for user mailboxes). Our request to add it, DCR 720928901, was closed on 3 November as not planned. Details and the feature request: https://feedbackportal.microsoft.com/feedback/idea/9bc115fa-51d8-f111-bda1-7c1e52baf49b. If your Group calendars depend on shared categories, please add your use case there.
