Lightning for Outlook
Lightning for Outlook was the historical Salesforce-branded name for the Microsoft Outlook add-in that embeds Salesforce inside the Outlook client.
Definition
Lightning for Outlook was the historical Salesforce-branded name for the Microsoft Outlook add-in that embeds Salesforce inside the Outlook client. Like its Gmail counterpart, the product has been renamed several times: Salesforce App for Outlook (early), Lightning for Outlook (2016-2018), Salesforce Outlook Integration / Outlook Integration and Sync (2019 onward). The functionality stayed essentially the same throughout: render a Salesforce panel inside Outlook, surface Salesforce records related to the email or meeting, log emails to specific records, and sync calendar events.
The modern product is configured under Setup, Outlook Integration and Sync. It works in Outlook on Windows, Mac, and the web Outlook 365 client. The add-in pairs with Einstein Activity Capture for automatic email-and-event sync (the modern default) or with Lightning Sync (deprecated but still available). Lightning for Outlook references persist in older Setup pages, AppExchange listings, and 2017-era documentation, but no new deployments should reference the legacy name.
How the Outlook integration evolved across rebrands
The naming history
Salesforce launched the Outlook add-in as Salesforce for Outlook (the desktop sync client) and later as Salesforce App for Outlook (the modern in-Outlook panel). The 2016 Lightning rebrand renamed it Lightning for Outlook. The 2019 Inbox consolidation moved it under Outlook Integration. The desktop-sync Salesforce for Outlook was retired in 2024; only the modern Outlook Integration model is supported now.
The retired Salesforce for Outlook desktop client
Salesforce for Outlook was a Windows desktop application that ran on each user''s machine and bidirectionally synced contacts, events, and tasks between Outlook and Salesforce. It was retired in 2024 after years of customer complaints about installation issues and the increasing impracticality of supporting a desktop client across modern Microsoft 365 deployments. Customers who relied on Salesforce for Outlook had to migrate to Outlook Integration plus EAC.
The modern Outlook Integration
The modern Outlook Integration is a Microsoft 365 add-in that runs inside Outlook (desktop and web). It renders a Salesforce panel showing relevant records, lets users log emails and events to Salesforce, and (with EAC enabled) syncs activity automatically. The add-in installs via the Microsoft 365 admin center, not via a desktop installer; admins approve it once for the organization and it appears in every user''s Outlook.
Einstein Activity Capture for auto-sync
EAC is the modern sync engine for Outlook the same way it is for Gmail. The user authorizes Salesforce to read their Outlook account; EAC then watches the inbox and calendar, matching each item to Salesforce records by email address and creating activity entries. Without EAC, users log emails manually via the Outlook add-in.
Microsoft 365 admin coordination
The Microsoft 365 admin must approve the Salesforce add-in for the organization before users can install it. Without the approval, users hit a Microsoft security warning at install time. This is the most common rollout blocker; coordinate with the Microsoft admin in advance of the user-facing rollout.
Lightning Experience requirement
Outlook Integration requires Lightning Experience on the Salesforce side. Salesforce Classic users cannot use the add-in. Orgs still on Classic must complete their Lightning migration before rolling out modern Outlook Integration.
Salesforce Inbox productivity features
The Salesforce Inbox license adds productivity features inside Outlook: send-later, email tracking, insert-availability, and Salesforce-hosted email templates. Like Gmail, the basic Outlook Integration is free with most Sales Cloud editions; Inbox features cost extra.
Migrate from Lightning for Outlook to modern Outlook Integration
Most orgs already migrated; the work is mostly verifying the configuration and updating documentation to use modern naming.
- Audit current state
Setup, Outlook Integration and Sync. Confirm the integration is active. Check that EAC is the configured sync engine (not Lightning Sync, which is deprecated).
- Coordinate with the Microsoft 365 admin
The MS admin must approve the Salesforce add-in for the org. Without approval, users cannot install.
- Install the Outlook add-in
Users install via Microsoft 365 admin center or via the Outlook Add-ins menu. Most orgs deploy centrally so every user gets it automatically.
- OAuth Outlook to Salesforce
Users complete the OAuth handshake to grant the add-in read access to their Outlook mailbox.
- Verify EAC sync
Confirm activities flow into Salesforce automatically. Verify the activity feed on relevant records.
- Update internal documentation
Replace Lightning for Outlook references with Outlook Integration in admin docs and onboarding material.
- Salesforce for Outlook (the desktop sync client) was retired in 2024. Orgs still relying on it must migrate to Outlook Integration plus EAC.
- Microsoft 365 admin approval is the most common rollout blocker. Coordinate in advance.
- Lightning Sync is deprecated; EAC is the modern path. New deployments should use EAC.
- Inbox productivity features (send-later, tracking) require separate Inbox licensing; the basic Outlook Integration covers email logging.
Trust & references
Cross-checked against the following references.
- Outlook IntegrationSalesforce Help
- Set Up Outlook IntegrationSalesforce Help
Straight from the source - Salesforce's reference material on Lightning for Outlook.
- Einstein Activity CaptureSalesforce Help
About the Author
Dipojjal Chakrabarti is a B2C Solution Architect with 29 Salesforce certifications and over 13 years in the Salesforce ecosystem. He runs salesforcedictionary.com to help admins, developers, architects, and cert/interview candidates sharpen their fundamentals. More about Dipojjal.
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