Einstein Activity Capture: What It Is, How It Works, Limitations & Alternatives

If your sales team works in Gmail or Outlook while your revenue teams work in Salesforce, there is an obvious gap: customer activity happens outside the CRM.

Emails are sent. Meetings happen. New stakeholders enter conversations. But unless that activity makes its way into Salesforce, your CRM can never provide a complete picture of the customer relationship.

That’s the problem Einstein Activity Capture (EAC) is designed to solve.

Einstein Activity Capture automatically captures email and calendar activity from connected Microsoft or Google accounts and associates it with relevant Salesforce records. It reduces manual data entry and gives sales teams greater visibility into customer interactions. (Salesforce)

Before Summer ’25, captured EAC email data lived outside standard Salesforce records. It wasn’t available to many Salesforce Platform features, couldn’t be exported in the same way as standard records, and was subject to EAC-specific retention limitations.

Starting in Summer ’25, Salesforce introduced Sync Email as Salesforce Activity. With it enabled, EAC stores captured email as standard Salesforce ‘Task‘ and ‘EmailMessage‘ records. The data can be used in standard reports, workflows, triggers, SOQL and APIs. (Salesforce)

Salesforce is now migrating older EAC implementations to the new architecture as well, with automatic migration dates rolling out during 2026. (Salesforce).

This guide looks at how Einstein Activity Capture works in 2026, what it does today, what it costs, where it stops, and what to do about it.

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What Is Einstein Activity Capture?

Einstein Activity Capture is Salesforce’s activity-capture capability for automatically bringing email and calendar activity into Salesforce.

It connects with Microsoft and Google accounts and can capture emails, calendar events, contact activity and meeting activity.

Captured emails can now be stored as Salesforce EmailMessage and Task records and associated with relevant users, contacts, leads, accounts and opportunities. Salesforce’s matching logic can also be customized using Flow. (Salesforce)

The basic workflow is:

Gmail / Microsoft 365 → Einstein Activity Capture → Email + calendar activity → Salesforce records → Reports + automation + APIs + AI

For many organizations, that’s exactly what they need.

The question is what happens after the activity reaches Salesforce.

How to Set Up Einstein Activity Capture

EAC connects to a rep’s mailbox and calendar via OAuth (Microsoft 365/Exchange or Google Workspace).
It reads email and calendar metadata – sender, recipients, subject, timestamp, attendees, and runs it through Salesforce’s matching logic to identify related Contacts, Leads, Accounts, and Opportunities. Salesforce exposes this as a customizable “Activities: Match Email to Records” flow, so admins can adjust matching behavior rather than accepting a fixed black box.
Matched activity appears on the record’s Activity Timeline.

What Einstein Activity Capture Does Well

If you’re evaluating Salesforce activity capture options, EAC is generally a good fit for organizations that want core activity capture up and running quickly, without investing heavily in custom configuration or development. It tends to work best when you’re looking for:

1. It removes manual activity logging

Sales reps don’t have to remember to manually log every email or meeting. That’s still EAC’s fundamental value proposition.

2. It is deeply integrated with Salesforce

For organizations already running Salesforce, EAC provides a native way to connect email and calendar activity with CRM data.

3. Captured email is now Salesforce data

With Sync Email as Salesforce Activity, captured emails can be used by standard Salesforce reports, workflows, triggers and APIs. (Salesforce)

4. Matching can be customized

Salesforce provides the Activities: Match Email to Records Flow, which administrators can customize to change how captured emails are associated with CRM records. (Salesforce)

5. Salesforce is continuing to invest in the architecture

Salesforce is retiring its older Activity 360 Reporting, Activity Metrics and Activities Dashboard capabilities in favor of standard Salesforce activity data. (Salesforce)

So the fair assessment isn’t: “EAC is an old, limited activity-capture tool.” It’s: EAC has become a more capable Salesforce-native activity data layer.

Einstein Activity Capture Limitations in 2026

The important question in 2026 isn’t whether EAC can capture activity. It can. The question is whether capturing activity automatically gives revenue teams the intelligence they need.

Often, it doesn’t.

1. Email aliases aren't supported

Salesforce’s own documentation states that EAC sends email only from the connected account and that alias addresses aren’t supported. Email aliases also can’t be authenticated as separate connected accounts. (Salesforce)

For organizations where reps operate with multiple sending identities, this can create gaps between the way people communicate and the way Salesforce captures that communication.

2. EAC doesn't automatically create an Opportunity Contact Role (OCR) from every interaction

EAC can associate email activity with an opportunity, but that’s different from creating and maintaining the Opportunity Contact Role structure that many revenue teams use to understand who’s involved in a deal.

This distinction is important.

An opportunity with six active customer contacts is not necessarily an opportunity with six meaningful buying-group members.

The CRM needs to know not just who emailed us. It also needs to tell who is actually involved in this buying decision, and what role they play.

3. Multi-attendee activity can become a data problem

Salesforce can associate synced email with multiple contacts of up to 50 unique email addresses from the From, To and CC fields. (Salesforce)

But more activity doesn’t automatically mean better relationship intelligence.

An enterprise meeting can include:

A champion
An economic buyer
A technical evaluator
Procurement
Legal
Several internal participants

The important question isn’t simply whether everyone was captured. It’s knowing which buyers matter to the opportunity. And who attended the meetings versus who were merely invited.

That is a layer beyond activity capture.

4. Historical backfill has boundaries

Current Salesforce documentation says each user can sync up to 50,000 historic emails from the past 180 days, with the sync stopping when either limit is reached. Salesforce also specifies different historical windows for email insights and migrations. (Salesforce)

That matters when a company is migrating a large, mature Salesforce environment.

Historical activity isn’t just a technical detail. For revenue teams, it can be the difference between having activity from the last few months to actually being able to understand the history of this customer relationship.

5. CRM Analytics licensing gates custom reporting

Standard Salesforce reports can query EAC’s now-native EmailMessage/Task records without issue. Building custom dashboards on top of that data, though, typically requires a CRM Analytics license, an added cost that’s easy to miss when evaluating EAC as “free,” and worth confirming with your Salesforce rep before assuming your reporting needs are covered at no extra charge.

6. Licensing

Standard EAC comes with 100 Permission Set Licenses. Above that you move to EAC Premium, available through Sales Engagement.

The threshold is a permission set licence limit rather than an edition rule, so it never appears in Salesforce’s edition matrix. Most organizations do not know it is there until they cross it.

Check your own allocation in Setup > Company Information > Permission Set Licenses, under EAC Standard.

7. Sync reliability and reconnection overhead

A recurring theme in practitioner discussion is EAC connections silently breaking: an expired token, a permissions change, an IT policy update, with admins only discovering the gap once they notice missing activity weeks later.

8. No buying-committee or persona intelligence

There’s no automatic tagging of Economic Buyer, Champion, Decision Maker, or Influencer from captured activity. EAC tells you an interaction happened, not who the person on the other end is to the deal.

Einstein Activity Capture and Salesforce Storage Limits

Moving email into Salesforce records solves one problem. It creates another consideration of storage.

Salesforce explicitly notes that synced emails and tasks are subject to your organization’s Salesforce data-storage limits and recommends archiving email data to long-term storage such as Data 360 to manage storage costs. (Salesforce)

And there are real-world reports of organizations seeing unexpected storage increases.

On July 13, 2026, a Salesforce administrator reported on Reddit that their organization experienced a 20 GB increase in EmailMessage storage within 24 hours after an EAC/Microsoft Graph change. The administrator said Salesforce Support attributed the issue to Microsoft Graph pulling more than two years of historical email, although the thread was subsequently updated to say Salesforce acknowledged the issue on its side. The post received 27 upvotes. (Reddit)

This isn’t evidence that every EAC implementation will experience a 20 GB spike. It is evidence of something more useful: When email becomes Salesforce data, email volume becomes a Salesforce data-management issue.

That’s a trade-off organizations should understand before migrating.

Activity Clutter After the Einstein Activity Capture Migration

There is a second issue that becomes visible once emails are stored as Salesforce activities.

In an April 2026 Salesforce Reddit discussion about the EAC migration, an administrator reported: “Activities store every reply as a new task, which clogs up the activities related lists.”

The post had 20 upvotes. The administrator noted that although Salesforce threads the messages in EmailMessage, the corresponding activities can make related lists difficult to manage. (Reddit)

Again, this isn’t a reason to conclude that EAC is broken. It’s a usability trade-off created by moving more email into standard Salesforce activity records.

More CRM data doesn’t automatically mean a cleaner CRM.

Why This Matters More in an AI-Agent World

The stakes on the remaining gaps have changed even as reportability improved. When a human sales manager pulled a report with incomplete activity data, the cost was an annoying afternoon reconciling numbers. When an AI agent reads that same data, now genuinely queryable but still missing contacts, committee roles, and attendee-level attribution, and autonomously decides which accounts are at risk or what a rep should do next, the cost of those specific gaps compounds at machine speed with no one checking the work. Making the data reportable was necessary. It didn’t make the data complete.

Why Nektar is a Strong Alternative to Einstein Activity Capture

EAC and Nektar overlap at the activity-capture layer. Both can help bring customer activity into Salesforce. But their primary jobs are different.

Einstein Activity Capture captures and synchronizes customer activity with Salesforce.

Nektar captures customer activity and turns it into structured buyer and opportunity intelligence.

The difference can be summarized as: EAC helps Salesforce record what happened. Nektar helps revenue teams understand what it means.

Capability	Einstein Activity Capture (current, post-Summer-2025)	Nektar
Email and calendar capture	Yes	Yes
Captured email stored as native, reportable Salesforce records	Yes, since Summer 2025	Yes
Automatic contact creation	No	Yes, configurable rules, domain matching, guardrails
Opportunity Contact Role creation	No	Yes, auto-populated on active opportunities
Custom object support	No	Yes
Email alias / secondary domain coverage	No (per Salesforce's own documentation)	Yes
Multi-attendee meeting attribution	Shallow: logs the meeting, not per-attendee relevance	Yes, attributed per participant
Buyer persona tagging (EB, Champion, Decision Maker)	No	Yes
Verified meeting attendance vs. invited-only	No	Yes, via Zoom/Teams/Meet
Historical backfill depth	Limited by design	As far back as needed, including past employees
Retroactive correction of historical records	No	Yes, Time Travel™
Custom dashboard reporting	Requires separate CRM Analytics license	Included
Sync reliability	Manual reconnection required	Continuous, self-healing
Cost	Included up to 100 users, paid tier above that	Paid, usage-based

Teams that have made the switch describe the gap in consistent terms:

“The biggest gap for sure is just capturing contacts. We’re missing tons of interactions just because we don’t have all the contacts in.”

“We have mostly 1 or 0 contact roles in our opportunities. Most of our relationships are not synced in Salesforce, because of which we cannot run our AI workflows.”

In practice, teams migrating from EAC have seen Nektar backfill tens of thousands of previously missing contacts and hundreds of thousands of historical activities that existed in mailboxes but never made it into Salesforce.

As an example, let’s assume this email arrives:

“We like the proposal. Our security team has a few questions before we can move ahead. I’ll bring them into the next call.”

EAC: EAC captures the email and associates it with the relevant Salesforce records. Salesforce now knows an interaction occurred.

Nektar: Nektar can use the interaction to identify signals such as:

A new stakeholder has entered the deal
Security is now part of the buying process
The buying group has changed
A new buyer role may need to be mapped
The next meeting may require a different set of participants

The difference is:

Activity capture → Salesforce

versus

Activity → buyer intelligence → opportunity intelligence → Salesforce

Is EAC Enough for Your Organization?

This is where the answer should be balanced. EAC may be enough if you primarily need:

Automatic email capture
Calendar synchronization
Less manual CRM entry
Better activity visibility
Salesforce-native activity records
Standard reporting and automation

For those requirements, EAC is a credible solution.

Salesforce community discussions include organizations that have recently activated EAC and reported positive experiences, as well as customers who have moved away from competing activity-capture products and returned to EAC. (Reddit)

That’s important context. The goal isn’t to argue that every organization should replace EAC.

The goal is to help buyers understand where EAC ends and where a revenue-intelligence platform begins.

When Should You Consider an EAC Alternative?

Consider an alternative when your problem goes beyond how you get your emails into Salesforce.

And you want to know how you can make Salesforce understand what’s happening across your opportunities and buying groups?

That might include:

Automatically identifying buying groups
Mapping buyer personas
Populating opportunity contact intelligence
Understanding who actually engaged in meetings
Identifying stakeholder changes
Measuring buying-group coverage
Surfacing competitive and pricing signals
Turning activity into opportunity intelligence
Reducing the amount of custom Salesforce logic your RevOps team needs to build

That’s where Nektar fits.

Einstein Activity Capture FAQs

Q. What is Einstein Activity Capture?

Einstein Activity Capture automatically captures email and calendar activity from connected Microsoft or Google accounts and associates it with relevant Salesforce records. With Sync Email as Salesforce Activity, captured email is stored as Salesforce EmailMessage and Task records.

Q. Did Einstein Activity Capture change in 2025?

Yes. Salesforce introduced Sync Email as Salesforce Activity in Summer ’25. Newer EAC implementations can store captured emails as standard Salesforce records, making the data available to reports, workflows, triggers and APIs.

Q: Is Einstein Activity Capture free?

It comes with the Sales Cloud licence, which is why most teams experience it as free. Standard EAC includes 100 Permission Set Licenses, and above that you move to EAC Premium through Sales Engagement. That threshold sits on the permission set licence rather than the edition, so it does not show in Salesforce’s edition matrix. Check yours in Setup > Company Information > Permission Set Licenses.

Q: Does Einstein Activity Capture store email in Salesforce?

Yes, for organizations using Sync Email as Salesforce Activity. Captured emails are stored as EmailMessage and Task records. Older EAC implementations that have not migrated work differently.

Q: Can Einstein Activity Capture match emails to opportunities?

Yes. Salesforce’s matching Flow can associate email activity with relevant accounts and opportunities, and administrators can customize the matching logic.

Q: Does Einstein Activity Capture support email aliases?

Salesforce states that email aliases aren’t supported as separate connected accounts.

Q: How much historical email can Einstein Activity Capture sync?

Salesforce currently documents a limit of up to 50,000 historic emails per user from the past 180 days, subject to the sync limits and configuration.

Q: Does Einstein Activity Capture use Salesforce storage?

Yes. With Sync Email as Salesforce Activity, synced emails and tasks consume Salesforce data storage. Salesforce recommends considering long-term archiving strategies as part of storage management.

Q: What are the biggest limitations of Einstein Activity Capture?

The important limitations today are less about basic email capture and more about how far EAC goes beyond capturing activity. Areas such as buying-group intelligence, buyer-role intelligence, activity-derived revenue signals and sophisticated opportunity intelligence require capabilities beyond basic EAC capture and matching.

Q: Is Einstein Activity Capture still a good option in 2026?

For organizations primarily looking for automated Salesforce activity capture, yes. Salesforce has substantially changed the underlying architecture since Summer ’25, and some customers continue to report positive experiences with EAC.

Q: Is Nektar an alternative to Einstein Activity Capture?

Yes. Nektar can be evaluated as an alternative when the requirement extends beyond activity capture into buyer, buying-group and opportunity intelligence.

The Bottom Line

Einstein Activity Capture deserves a more nuanced assessment in 2026.

The old criticism that “EAC captures email but doesn’t put it into Salesforce records” is no longer accurate for organizations using the current Sync Email as Salesforce Activity architecture.

Salesforce changed that in Summer ’25. Captured email can now live as standard EmailMessage and Task records, participate in reporting and automation, and be accessed through APIs.

That is a meaningful improvement.

But the change also introduces new considerations: Salesforce storage consumption, activity-list clutter, historical sync boundaries, alias limitations and the continued gap between capturing activity and understanding the people and opportunities behind that activity.

And that last distinction is where Nektar is different.

EAC captures the activity. Nektar turns activity into buyer and revenue intelligence.

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