Emails Captured via 'Einstein Activity Capture' Not Seen in the Activity Timeline

Einstein Activity Capture (EAC) automatically streams or captures emails from your Outlook or Gmail to Salesforce. However, the emails streamed or captured in Salesforce using EAC aren’t created as records and aren’t saved in the database of Salesforce as 'Email Messages'. This is unlike the emails added manually. This is why all the emails that are captured or streamed aren’t visible under the Activity History of records. Instead, they’re shown under the Activity Timeline only in Lightning Experience.
 

• Primary email address of the Contact or Lead has been changed or deleted.
• Einstein Activity Capture has been turned off.
• Email address or domains of Contact have been added to the excluded addresses. Review Exclude Emails and Events from Being Added to Salesforce for All Users.
• Emails have been deleted using the Data Policies Feature. Review Delete Email and Events Logged by Einstein Activity Capture and Salesforce Inbox.
• Email participants don’t have a record (Lead, Contact, or Person Account) in Salesforce.
• Email participants belong to the same internal domain of the User, without marking any external domain mail address. Review Considerations for Excluding Data from Einstein Activity Capture.
• Email is older than 6 months (for Google) or 6–12 months (for Microsoft, depending on license), which doesn't fall under the allowed data capture time period. Check Data Retention for Einstein Activity Capture to know more.
• Emails don’t stream to Contacts or Leads if the record contains a mixture of standard and custom email address fields. It’s a best practice to use standard email address fields with Activity Capture.
• Automated email replies. Einstein Activity Capture attempts to identify automated email replies and keep them private. See Prevent Sensitive Information from Appearing on the Activity Timeline (please right click the link and open in a new tab/window) and Einstein Activity Capture - Sensitive Emails in the Activity Timeline Show as Private.
• Emails captured before related records are created, in Salesforce, will not show in the Activity Timeline

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