You can assign backups for the Assignee and Approver roles only when the primary user is a named user, not a team or group.
Assignee: For basic tasks (not automated tasks)
Approver: For both basic and automated tasks
Administrators cannot back up owner assignments on templates, schedules, and tasks.
To assign a backup for a task:
- Open the task for which you want to assign a backup.
- Select the Workflow tab and select both an Assignee and Backup user.
- Click Save and Close.