---
schema_version: "1"
id: 2ee8aa7eefae79c6da7a723066b42a277979d4d61a18155ea0de76cdfe7b5486
title: Upgrade Microsoft 365 Authentication in Inbox to Microsoft Graph
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/release-notes/264-0-0/rn_sales_productivity_inbox_graph_migration.md
canonical_url: https://help.salesforce.com/s/articleView?id=release-notes.rn_sales_productivity_inbox_graph_migration.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 0127937720c6606db3ada7e155d8630eeb2da5dadc57d2d828fd22fa49703b84
description: 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.
products:
  - Cross Cloud
release: "264"
---
# Upgrade Microsoft 365 Authentication in Inbox to Microsoft Graph

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.

![Inbox setting where you start the Microsoft Graph migration process.](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-release-notes-salesforce_release_notes-264-0-0-production-enus/550ba85b-db1a-4608-9cd4-9a65ec96e1fa/salesforce_release_notes/images/sales/rn_sales_productivity_inbox_graph_upgrade_new.png)

#### See Also

- [Upgrade Microsoft 365 Authentication in Einstein Activity Capture to Microsoft Graph](https://help.salesforce.com/s/articleView?id=release-notes.rn_sales_productivity_eac_graph_ga.htm&release=264.0.0&type=5 "Transition your Einstein Activity Capture’s Microsoft Office 365 authentication to Microsoft Graph, to keep your data syncing without disruption when Microsoft retires Exchange Web Services (EWS) in October 2026. Microsoft Graph is the new, secure, and scalable standard for authentication. Proactive notifications and a single-click tool make the upgrade process smooth.")
- [_Salesforce Help:_ Migrate Inbox to Microsoft Graph](https://help.salesforce.com/s/articleView?id=sales.inbox_graph_migration.htm&language=en_US)
- [_Microsoft Learn_: Deprecation of Exchange Web Services in Exchange Online](https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/deprecation-of-ews-exchange-online)