1. Create Custom Email Application Panes for Lightning for OutlookWhen you create custom email application panes, you set the Salesforce content and features that sales reps see in Microsoft® Outlook®. Use the Lightning App Builder to create custom application panes.
2. Assign Custom Email Application Panes for Lightning for OutlookTo get your reps up and running using custom email application panes, activate the panes and assign them to user profiles. Set a custom email application pane as the default for all users, or assign a pane to specific user profiles.