Migration from Exchange Web Services to Microsoft Graph

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.

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

    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.