Cisco's official response for Third Party backup Programs
Support Policy for Backup Software
Cisco support policy is that customers can deploy third-party software for backup on the Cisco Unity server. However, Cisco expects that customers (or their systems integration partners) will have tested the interoperability of such products with Cisco Unity before the products are deployed, to mitigate the risk of problems being discovered within the production environment between Cisco Unity and the third-party products loaded on the Cisco Unity server.
If a customer calls Cisco TAC with a problem, a Cisco TAC engineer may require that such third-party software be turned off or even removed from the Cisco Unity server during the course of troubleshooting. If it is determined that the interoperability between the third-party software and Cisco Unity was the root cause of the problem, then the third-party software will be required to be disabled or removed from the Cisco Unity server until such time that the interoperability issue is addressed, so that the customer can continue to have a functional Cisco Unity system.
Before installing any qualified Microsoft service pack on the Cisco Unity server, confirm that the manufacturer of any optional third-party software or hardware that you plan to install on the Cisco Unity serveror that is already installedalso supports the service pack for use with its product.
For information on backing up Cisco Unity, refer to the applicable version of the Cisco Unity Maintenance Guide at http://www.cisco.com/en/US/products/sw/voicesw/ps2237/prod_maintenance_guides_list.html.