When a Salesforce Inbox license is assigned to a user, the user must connect their Gmail or Microsoft Exchange account before they can send emails from Salesforce. This connection unlocks productivity features including Send Later, email tracking, and calendar sync.
This applies to Lightning Experience in Enterprise, Performance, and Unlimited editions. Users need the "Use Inbox" permission, available with the High Velocity Sales or Inbox license.
Users who have an Inbox license must connect their Gmail or Microsoft Exchange account to Salesforce before sending emails.
For Gmail:
For Microsoft Exchange / Outlook:
Note: If you do not see the connection option, contact your Salesforce administrator to confirm your Inbox license and "Use Inbox" permission are correctly assigned.
See Also
Connect Your Email and Calendar to Salesforce with Einstein Activity Capture or Inbox
Schedule and Manage Scheduled Emails in Lightning Experience
Set Up Send Later for Your Sales Reps
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