---
schema_version: "1"
id: bf9e5ee527372b4cd12e45b5df8f7524377112ce36e980f4fbd3f4d9314c3068
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/262-0-0/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=262.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 37d6be02768c0947f0596b6e81c32357e751d2f31275710914116094e5c2e110
description: Keep your emails, events, and contacts syncing without disruption by transitioning your Inbox’s Microsoft Office 365 connection to Microsoft Graph by October 1, 2026. Microsoft is retiring Exchange Web Services (EWS) in October 2026, making Microsoft Graph the new, secure, and scalable standard for authentication.
products:
  - Cross Cloud
release: "262"
---
# Upgrade Microsoft 365 Authentication in Inbox to Microsoft Graph

Keep your emails, events, and contacts syncing without disruption by transitioning your Inbox’s Microsoft Office 365 connection to Microsoft Graph by October 1, 2026. Microsoft is retiring Exchange Web Services (EWS) in October 2026, making Microsoft Graph the new, secure, and scalable standard for authentication.

**Where:** This change applies to Lightning Experience in all editions.

**When:** This feature is available starting in February 2026.

**Who:** The upgrade is available if Inbox and Einstein Activity is set up to use Microsoft Office 365. If you’re setting up Inbox with Microsoft 365 starting in Spring ’26, you’re automatically authenticated by using Microsoft Graph.

**Why:** This upgrade 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 the upgrade, make sure that your Azure admin has granted Microsoft Graph consent. Then, use the upgrade tool to consent and complete the upgrade. Users are required to reconnect to their Microsoft Office 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-262-0-0-production-enus/e945111b-3e0a-4011-accc-d5949363bfcc/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=262.0.0&type=5 "Transition your Einstein Activity Capture’s Microsoft Office 365 authentication to Microsoft Graph by August 3, 2026, 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:_ 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)