---
schema_version: "1"
id: cb1cc3c577728c3fa67879d080860ce2c53750cbb5f0a1e7fed95aee8ca5fc04
title: Upgrade Microsoft® Exchange Web Services to Microsoft® Graph in Lightning Sync Before October 2026
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_ls_ews_retirement.md
canonical_url: https://help.salesforce.com/s/articleView?id=release-notes.rn_sales_productivity_ls_ews_retirement.htm&release=262.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: e0c0ba1f1a9ffdea829870cf4c985e6a44abeb4c18212b2d29d98fd5a689cbd3
description: Microsoft announced the retirement of Exchange Web Services (EWS) for Microsoft Office 365 starting October 2026. Lightning Sync configurations that use EWS won’t capture or sync data after this retirement. To avoid service disruption, upgrade to the Microsoft Graph authentication method in Lightning Sync setup now.
products:
  - Cross Cloud
release: "262"
---
# Upgrade Microsoft® Exchange Web Services to Microsoft® Graph in Lightning Sync Before October 2026

Microsoft announced the retirement of Exchange Web Services (EWS) for Microsoft Office 365 starting October 2026. Lightning Sync configurations that use EWS won’t capture or sync data after this retirement. To avoid service disruption, upgrade to the Microsoft Graph authentication method in Lightning Sync setup now.

**Where:** Lightning Sync is available in Lightning Experience in Professional, Enterprise, Performance, Unlimited, and Developer editions.

**Who:** This change affects Lightning Sync configurations that use org-wide OAuth 2.0 with EWS to connect to Microsoft Office 365 or Microsoft Exchange Service Account.

**How:** From Setup, in the Quick Find box, enter and select Outlook Integration And Sync. Follow the process to complete the upgrade.

When you’re done, you can continue to use Lightning Sync, but we recommend migrating to Einstein Activity Capture. Lightning Sync is scheduled to retire in 2027.

#### See Also

- [_Salesforce Help:_ Upgrade Lightning Sync from Exchange Web Services to Microsoft Graph](https://help.salesforce.com/s/articleView?id=sales.lightning_sync_ews_to_graph.htm&type=5&language=en_US)
- [_Salesforce Help:_ Move from Lightning Sync to Einstein Activity Capture](https://help.salesforce.com/s/articleView?id=sales.lightning_sync_move_parent.htm&type=5&language=en_US)
- [_Salesforce Help:_ Upgrade Einstein Activity Capture Authentication from EWS to Microsoft Graph](https://help.salesforce.com/s/articleView?id=sales.eac_ews_graph.htm&type=5&language=en_US)