EWS Retirement: Your Exchange Online Graph Migration Plan
EWS is disabled by default on 1 October 2026 and permanently retired on 1 April 2027. Find your callers, set the allowlist, and plan the Graph move.
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Topic
Category: Microsoft 365
Administration and governance of Microsoft 365 tenants for admins responsible for Exchange Online, Teams, SharePoint, OneDrive, Intune, and Purview. Articles cover licensing decisions between Business Premium, E3, and E5, zero-touch provisioning with Autopilot and Intune, data loss prevention and retention including what native backup does not cover, permission and sprawl governance for SharePoint and Groups, mail flow troubleshooting, Graph API reporting, Copilot rollout readiness, and migration off retiring interfaces such as EWS. Tested against the service, module, and admin center versions named in each article.
21 articles
Exchange Online Message Trace vs Mail Flow Rules: Diagnosing Delivery Failures Step by Step
Diagnose Exchange Online delivery failures: message trace in EAC and PowerShell, Get-MessageTraceV2, transport rule audits, and a repeatable runbook.
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