Exchange Online EWS, Your Time is Almost Up | Microsoft . . . Today we’re announcing we will use a phased, admin controllable disablement plan that starts in October 2026 and concludes with a complete shutdown of EWS in 2027 This post explains what’s happening, when, and what administrators should be doing now
The end of EWS and what it means for your Microsoft 365 . . . EWS, the protocol introduced in 2005 to access Exchange mailbox data, will be fully retired by April 1, 2027, with a controllable disablement plan starting in October 2026 But the real shift has already started — Microsoft is updating its own applications and services to stop using EWS
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