1. Open the Settings Cog as a Confluence Administrator and click on 'Approval configuration'.

2. Click on the 'Migration' item in the Approvals for Confluence section.

3. Click on the 'Start Migration' button to migrate your existing data to the App.

4. This will begin the migration process, which could take several minutes.

5. If you go to a page with a Page Approval on it, you can see the byline contains the migrated data.