You can run a backup while logged out or logged in as a non-administrator by configuring the Backup software with an Administrator account on the source computer.
1. To do this, launch the Backup Console and choose the User Settings option.
2. Choose Scheduled Backups.
3. Next, click the option to "Run Backups on Behalf of" and type in a valid Administrator account.
4. Click the Test Settings button and click Save Settings when you are finished.
The backups will run while the computer is logged out.