Lightning for Outlook
A Lightning for Outlook is the historical Salesforce name for the Microsoft Outlook add-in that puts Salesforce inside the Outlook client.
Definition
A Lightning for Outlook is the historical Salesforce name for the Microsoft Outlook add-in that puts Salesforce inside the Outlook client. Salesforce introduced the name in 2016, then folded it into the broader Outlook Integration branding around 2019. The feature itself stayed consistent across the renames: show a Salesforce panel next to an email or meeting, surface the records that relate to the people on that message, log emails and events to those records, and pair with a sync engine for automatic activity capture.
The name still appears in older Setup screens, AppExchange listings, and 2017-era documentation, so it is worth knowing. New work should use the current label, Outlook Integration, which you configure under Setup, Outlook Integration and Sync. The add-in runs in Outlook on Windows, on Mac, and in Outlook on the web. It works only with Lightning Experience, and it usually pairs with Einstein Activity Capture for automatic email and event sync.
From Lightning for Outlook to Outlook Integration
Where the name came from
Salesforce has shipped several Outlook connectors over the years, and the names overlap in confusing ways. The oldest is Salesforce for Outlook, a Windows desktop application that installs on each laptop and syncs contacts, events, and tasks in the background. Separate from that, Salesforce built an in-Outlook panel that renders Salesforce records right beside the email you are reading. That panel launched as the Salesforce App for Outlook, then took the name Lightning for Outlook during the 2016 Lightning Experience push. Around 2019, Salesforce consolidated its email products and started calling the same panel the Outlook Integration. The capability did not change much across those renames. What changed was the marketing label and the Setup node you use to turn it on. If you read a 2017 admin guide that says Lightning for Outlook, and a 2024 guide that says Outlook Integration, they are describing the same add-in. Knowing the lineage saves you from hunting for a product that was simply renamed, and it explains why old AppExchange pages and community posts still use the legacy term.
The add-in versus the retiring desktop client
It is easy to mix up two very different products because both carry Outlook in the name. The Outlook Integration (formerly Lightning for Outlook) is a Microsoft 365 add-in. It lives inside Outlook, needs no per-laptop installer, and an administrator approves it once for the whole organization. Salesforce for Outlook is the older Windows desktop client. It installs on each machine and runs a background sync. Salesforce moved that desktop client into a maintenance-only phase and scheduled it for retirement in December 2027. That date matters because it was rescheduled more than once. An earlier plan targeted June 2024, which is why some notes call it already retired, but the official date is now December 2027. When the desktop client does retire, it stops syncing contacts, events, and tasks, and users lose its side panel. The recommended path is to move those users to the Outlook Integration add-in plus Einstein Activity Capture, which together cover the panel and the sync. Anyone still on Salesforce for Outlook should plan that migration well before the deadline.
What the add-in actually does in Outlook
Once enabled, the integration adds a Salesforce panel to the Outlook reading pane. Open an email or a calendar event, and the panel matches the sender and other participants to Salesforce contacts and leads by email address. It then shows the related accounts, opportunities, and cases, so a rep can see the full picture without leaving Outlook. From the panel a user can log that email to one or more Salesforce records, which creates an activity on each record timeline. Users can also create new Salesforce records, such as a contact or an opportunity, directly from the email. For meetings, the panel logs the event and can include the attendees. None of this requires the user to retype data into Salesforce. The matching is based on email address, so contacts in Salesforce need accurate email values for the panel to find them. Logging from the panel is manual by default. If you want emails and events to capture automatically, you add a sync engine, which is where Einstein Activity Capture comes in.
Einstein Activity Capture for automatic sync
The add-in by itself handles manual logging. To make email and calendar activity flow into Salesforce without a click each time, you pair it with Einstein Activity Capture, the modern sync engine. A user connects their Microsoft 365 mailbox to Salesforce, either through user-level authentication or through a service account that an admin scopes to a group. Once connected, Einstein Activity Capture watches the inbox and calendar, matches each item to contacts and leads by email address, and writes the activity to the timeline of related contacts, leads, accounts, opportunities, contracts, and quotes. It can also keep events and contacts in sync. This replaces the older Lightning Sync engine, which Salesforce closed to new customers in Winter 21 and scheduled for retirement in April 2027. If you are setting up the Outlook Integration today, default to Einstein Activity Capture for sync. Salesforce provides a migration tool to move existing Lightning Sync configurations across, and that move is worth doing before the 2027 cutoff rather than after.
Requirements and the Microsoft 365 dependency
Two requirements catch teams off guard during rollout. The first is Lightning Experience. The Outlook Integration works only when users are in Lightning Experience on the Salesforce side. Orgs still running Salesforce Classic cannot use the modern add-in and need to finish their Lightning migration first. The second is the Microsoft 365 side. The add-in is a Microsoft 365 application, and a Microsoft administrator usually has to approve it for the organization before users can install it. Without that approval, users hit a Microsoft security prompt at install time and the rollout stalls. This is the single most common blocker, and it is outside the Salesforce admin console, so plan the coordination early. On the supported clients, the add-in runs in Outlook on Windows, Outlook for Mac, and Outlook on the web. Check the current Outlook Integration system requirements page for the exact supported Outlook and Exchange versions, since Microsoft and Salesforce update that matrix over time. Getting both the Lightning and Microsoft prerequisites lined up before the user-facing launch keeps the project from stalling on day one.
Salesforce Inbox and the productivity layer
The basic Outlook Integration is included with most Sales Cloud editions, and it covers the panel and manual logging. On top of that, Salesforce Inbox is a paid add-on that brings productivity features into the same Outlook panel. Inbox adds capabilities like send later, email open tracking, insert availability for scheduling, and quick access to Salesforce-hosted email templates from inside Outlook. The same Inbox layer is what powers those features in the Gmail integration too, so a team running both clients gets a consistent experience. The line to remember for budgeting is simple. Logging and the record panel are free with Sales Cloud. The send-later, tracking, and availability features need the Inbox license. When stakeholders ask why some reps see email tracking and others do not, the answer is almost always the Inbox license rather than a configuration bug. Decide up front who needs the productivity features, license those users, and leave the rest on the no-cost integration. That keeps the spend aligned with the reps who genuinely live in their inbox all day.
How to enable the Outlook Integration (formerly Lightning for Outlook)
Lightning for Outlook is the legacy name for the Outlook Integration. You enable it from Setup on the Salesforce side, then coordinate the Microsoft 365 approval. Here is the modern path for a current org.
- Open the Outlook Integration setup
In Setup, enter Outlook in the Quick Find box and select Outlook Integration and Sync. This is the node that replaced the old Lightning for Outlook page.
- Turn on the integration
Switch Let users access Salesforce records from Outlook to on. This enables the add-in and exposes the email application pane settings for your org.
- Choose your sync engine
Set up Einstein Activity Capture so email and event sync happens automatically. Assign users through a configuration, using user-level authentication or a Microsoft 365 service account.
- Coordinate the Microsoft 365 approval
Ask your Microsoft administrator to approve the Salesforce add-in for the organization. Without this, users see a security warning when they try to add it in Outlook.
- Deploy and verify with users
Have a pilot user add the add-in in Outlook on Windows, Mac, or the web, open an email, and confirm the Salesforce panel loads and logs to a record.
Einstein Activity Capture is the modern default. Lightning Sync still works but is closed to new customers and retires in April 2027.
User-level authentication has each rep connect their own mailbox. A service account lets an admin onboard a whole group at once.
Enable Salesforce Inbox to add send later, email tracking, and insert availability inside the Outlook panel. This needs a separate license.
Customize which Salesforce components and quick actions appear in the Outlook panel so reps see the most relevant records first.
- The add-in works only in Lightning Experience. Salesforce Classic users cannot use it, so finish any Lightning migration first.
- The Microsoft 365 admin approval is the most common rollout blocker, and it lives outside Salesforce. Line it up before the user launch.
- Do not confuse this add-in with Salesforce for Outlook, the retiring desktop client. They are different products that share the Outlook name.
- Record matching is by email address, so contacts and leads need accurate email values or the panel will not find them.
Prefer this walkthrough as its own page? How to Lightning for Outlook in Salesforce, step by step
Trust & references
Cross-checked against the following references.
Straight from the source - Salesforce's reference material on Lightning for Outlook.
Hands-on resources to go deeper on Lightning for Outlook.
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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