It is possible to back up Planner plans. You can find the relevant toggle on Backup portal's Settings page.
Note
For your customers whose backups were enabled prior to the launch of Planner backup (1st of March, 2024), you need to grant the Planner related permission for the backup application in Microsoft Entra admin center. See the instruction here.
Enable backup for Planner plans
1. Click the Settings icon in the top-right corner.
2. On Settings page, select Organisation services.
3. Click the Planner plans slide switch to enable backup for Planners.
4. Click Save.