Transition your Inbox’s Microsoft 365 authentication method from Exchange Web Services (EWS) to Microsoft Graph, which is more modern, secure, and scalable. Microsoft is retiring EWS in October 2026, so switch to Microsoft Graph to avoid service disruption.
Where: This change applies to Lightning Experience in all editions.
When: This feature is available starting in February 2026.
Who: The update and migration is available if Inbox and Einstein Activity is set up to use Microsoft 365. If you’re setting up Inbox with Microsoft 365 starting in Spring ’26, you’re automatically authenticated by using Microsoft Graph.
Why: This migration is essential to align with Microsoft’s evolving security standards and to avoid potential disruptions as EWS reaches its end of life in October 2026. By transitioning to Microsoft Graph, Salesforce makes sure that your organization remains compliant and competitive, with improved support for modern features and enhanced user-level authentication.
How: Before and during migration, make sure that your Azure admin has granted Microsoft Graph consent. Then, use the upgrade tool to complete the upgrade. Users are required to reconnect to their Microsoft 365 accounts to complete the connection transition.
