Version 2.19 of the Salesforce Backup managed package now supports some read-only objects, including History associated objects and more Activities objects. Add these objects to your policy when you want to retain records for future auditing purposes such as reviewing changes to important fields over time.
Where: This change applies to Lightning Experience in Enterprise, Professional, and Unlimited editions.
Who: This change applies to editions that have the Salesforce Backup add-on subscription.
How: In the Salesforce Backup app, on the Backup tab, supported read-only objects appear in the list of available objects. Select an object, and enable it in your policy.