Microsoft is switching off Exchange Web Services in Exchange Online, with a phased rollout starting on or soon after Oct 1, 2026 and EWS fully and permanently disabled from April 1, 2027. Run the read-only Get-OrganizationConfig command, paste the output, and the decoder maps your EwsEnabled setting to Microsoft's switch-off cases and gives a dated checklist.
It is free, with no upload, no account and no AI call. Nothing you paste leaves the page. Dates can change, so follow your tenant's Message Center posts. On-premises Exchange EWS is not being retired. General guidance only. Not affiliated with or endorsed by Microsoft.
Built because Microsoft's EWSEnabled table changed in October and the case of True with no list now blocks apps. Sources are linked on the page.