By default, we don't store Mailchimp member activity as records in Salesforce. Instead, we display the latest information from Mailchimp via components you can add to your Lightning pages. If you'd like records in Salesforce, you can optionally enable stored email activity and choose which types (sent, open, click, etc.) to sync and how far back to go — see the Activity History guide to turn this on.

Changing your storage settings only applies moving forward — it doesn't automatically touch activity records that already exist in Salesforce. Depending on what you change, you may need a follow-up action:

• Increasing Days to Keep: Run a Refresh Email Activity with Run a full refresh checked. A normal sync won't reliably backfill the older history now included in your wider window.

• Decreasing Days to Keep: No action needed. The next primary sync automatically removes activity records that fall outside your new retention window.

• Changing which activity types are stored (opens, clicks, bounces, etc.): Run a Refresh Email Activity with Run a full refresh checked, so the newly added type gets backfilled.

Running an Email Activity Refresh

Go to Mailchimp Settings > General Settings, then open the dropdown next to Sync Now and select Refresh Email Activity.

The modal gives you two options:

• Partial refresh (default): Syncs activity since the last activity sync only.

• Run a full refresh: Reprocesses all available activity in your retention window, regardless of what's already synced. This is what you need after increasing Days to Keep or adding an activity type.

Click Start to run it.

Note: A full refresh reprocesses more data, so it can take noticeably longer than a partial refresh or your regular primary sync.

Related Articles

• Activity History [Full Guide]

• Do you store all email activity?

• Why does the initial email activity sync take a long time?