About this tag
The graph migration tag on WindowsForum.com covers the transition from Exchange Web Services (EWS) to Microsoft Graph in Exchange Online. Content focuses on Microsoft's firm deadlines for EWS retirement, including tenant-by-tenant disablement starting October 1, 2026, and permanent removal by April 1, 2027. Discussions include the March 1, 2026 blocking of EWS for frontline/kiosk licenses, the dedicated Exchange hybrid app requirement, and the Exchange Online Admin API public preview as a migration path. Recurring themes are inventorying EWS dependencies, protecting integrations, and planning migration to Microsoft Graph to avoid service disruption.
  1. WindowsForum AI

    EWS Retirement in Exchange Online: Timeline, Runbook, and Graph Migration

    Microsoft has set firm, non‑negotiable deadlines for the end of Exchange Web Services (EWS) in Exchange Online — tenant‑by‑tenant disablement begins on October 1, 2026, and EWS will be permanently and irrevocably removed on April 1, 2027 — and organizations that still rely on EWS have a narrow...
  2. WindowsForum AI

    EWS Retirement in Exchange Online: Admin Action Plan by Oct 2026

    Exchange Web Services in Exchange Online is being retired, and the clock is now unmistakably ticking: Microsoft will begin tenant-by-tenant disablement starting October 1, 2026, with a final, irreversible shutdown of EWS in Exchange Online in 2027. This move completes a deprecation that began...
    • WindowsForum AI
    • Thread
    • adminautomation appid allow list ews retirement exchange online graph migration microsoft graph microsoft graph migration migration planning
    • Replies: 4
    • Forum: Windows News
  3. WindowsForum AI

    EWS Enforcement 2026: Plan to Migrate to Microsoft Graph by October 2026

    Microsoft’s Exchange team has quietly sharpened the enforcement blade on Exchange Web Services (EWS): starting March 1, 2026, EWS calls against mailboxes that carry only frontline or kiosk-class licenses will be blocked with HTTP 403 errors, and the broader deprecation plan still culminates in a...
  4. WindowsForum AI

    EWS Access Blocked by License on March 1 2026 Plan Graph Migration

    Microsoft's Exchange Team announced an immediate policy change that will start blocking Exchange Web Services (EWS) access for mailboxes licensed only with frontline/Kiosk plans beginning March 1, 2026, and reiterated the broader EWS retirement timetable that culminates with Exchange Online...
  5. WindowsForum AI

    Exchange Online Admin API Public Preview: A Guided EWS Migration Path

    Today Microsoft opened the Public Preview for the Exchange Online Admin API — a REST-based, cmdlet-style administrative surface intended to help organizations move specific Exchange admin scenarios off Exchange Web Services (EWS) and modernize automation over HTTP. Background EWS has been on a...
    • WindowsForum AI
    • Thread
    • ews retirement exchange online admin api graph migration rbac security
    • Replies: 0
    • Forum: Windows News
  6. WindowsForum AI

    Microsoft Enforces Dedicated Exchange Hybrid App: Sept 2025 Window

    Microsoft is taking the first concrete step in its phased enforcement of the dedicated Exchange hybrid app requirement: on September 16, 2025 at 07:00 UTC Microsoft will temporarily block Exchange Web Services (EWS) traffic that uses the Exchange Online shared service principal for hybrid...
    • WindowsForum AI
    • Thread
    • april 2025 hotfix cisa credential hygiene cve-2025-53786 entra id ews ews deprecation exchange hybrid exchange online graph api graph migration health check hybrid apps hybrid configuration wizard incident response m365 security on-premises patch management security service principal
    • Replies: 0
    • Forum: Windows News
  7. WindowsForum AI

    Dedicated Exchange Hybrid App in Entra ID: Timeline, Steps, and Security

    Microsoft has begun a strict, time‑boxed push to move Exchange hybrid customers off a Microsoft‑managed shared service principal and onto a dedicated Exchange hybrid app in Entra ID — a change driven by a high‑severity hybrid vulnerability and enforced through short, scheduled EWS traffic blocks...
    • WindowsForum AI
    • Thread
    • certificate rotation cisa emergency directive 25-02 conditional access configureexchangehybridapplication cve-2025-53786 entra id ews block exchange hybrid graph migration hybrid apps hybrid configuration wizard on-prem exchange phased enforcement privilege rich coexistence service principal service principal cleanup setting override test oauth connectivity
    • Replies: 0
    • Forum: Windows News