What is Einstein Activity Capture and what are its trade-offs?

Einstein Activity Capture (EAC) is a Salesforce-native sync between users' email/calendar (Outlook 365, Gmail/Google Workspace) and Salesforce. It captures emails to and from prospects/customers, calendar events, and sometimes contact info, and surfaces them on Salesforce records.

What it captures:

• Emails — both directions, when at least one matched contact is on the email. Surfaced on the contact's, opportunity's, or account's activity timeline.
• Calendar events — meetings shown on the activity timeline.
• Contacts — optionally syncs contacts from the user's mailbox to Salesforce.

Architecture:

• EAC stores activity data on Salesforce-managed AWS infrastructure, NOT in your Salesforce org's normal storage.
• Activities are virtual — they appear in the timeline but they're not actual Task or Event records you can report on with normal report types.
• A user must connect their mailbox once. After that, sync runs in the background.

Trade-offs:

Pros:

• Zero-effort capture — reps don't manually log activities.
• Free with Sales Cloud licence (depending on edition).
• Real-time visibility into rep-prospect engagement.

Cons:

• Activity reporting is limited — because activities aren't standard Tasks/Events, traditional Activity reports don't include them. You need EAC-specific reports.
• Data residency concern — activities are on Salesforce-managed AWS, not in your org. Some compliance regimes find this problematic.
• Limited retention — captured emails are retained for 24 months by default (extendable with an add-on).
• Sync gaps — disabling/re-enabling can leave gaps in the timeline.
• Cannot edit captured activities — they're read-only views into the user's mailbox.

When orgs prefer alternatives:

• Salesforce Inbox (older, manual log) — for orgs that want activity records persisted as standard Tasks.
• Third-party apps (Cirrus Insight, Groove) — more control, more reporting, more cost.

Modern guidance: enable EAC for activity capture, but don't rely on it for compliance-grade activity records. Pair with manual logging for the activities you must persist.