---
title: Migration from Exchange Web Services to Microsoft Graph
slug: emailplus/guide/ios/migration-from-exchange-web-services-to-microsoft-graph
createdAt: 2026-09-07T11:21:47.772Z
---

Steps to Enable Microsoft Graph for Delegation Features:

To migrate delegated mailbox and calendar functionality from Exchange Web Services EWS to Microsoft Graph, complete the following steps:

- Upgrade Email+ to version 5.5.0 or later.
- Update the Email+ App Configuration to enable Microsoft Graph support.

:::hint{type="info"}
Note: Do not remove any existing EWS-related configuration keys during the transition.
:::

- Enable the Graph API feature by adding the following value to the Key Value Pair **enabled\_features** configuration:
  - graph\_api

    :::hint{type="info"}
    Before enabling the graph\_api feature flag and configuring the Microsoft Graph KVPs, ensure that Email+ version 5.5.0 or later is installed on user devices. Enabling this feature on earlier versions is not supported.
    :::
- Configure the Microsoft Graph settings:
  - email\_graph\_host=graph.microsoft.com
  - msal\_graph\_resource\_scope=https\://graph.microsoft.com/.default
  - msg\_min\_allowed\_auth\_mode=modern\_auth
  - realtime\_notifications\_protocol=1
- Deploy the updated configuration to managed devices through your UEM/MDM console.
- Verify delegated mailbox and calendar functionality after deployment to ensure Microsoft Graph connectivity is working as expected.

Email+ will use Microsoft Graph API for delegated mailbox, shared mailbox, delegated calendar, and shared mailbox calendar functionality.