Click on "Settings" in the bottom left of the desktop app.
Click "Integrations" in the middle section of the app.
Under Salesforce, make sure that mark activities as complete is set to "Always".
Calls will now always display in the activity history, as opposed to open activities.
If you have any questions or issues, please reach out to the Truly support team at support@truly.co or by clicking your initials in the upper right corner in the desktop app and we’ll be happy to assist!