Hi Chandra,

The supported method for doing this is via the Unity tool "Message Store Manager"

Message Store Manager Utility

The Message Store Manager utility, available in Tools Depot, can be used for a variety of subscriber message store maintenance tasks, including updating subscriber properties, archiving messages, deleting messages, and running detailed mailbox status reports, all according to configurable schedules.

The Message Store Manager utility allows administrators to set up subscriber groups, called agents. Each action that an administrator sets up the Message Store Manager utility to do is performed on an agent, or on a specified subset of the members of the agent. Agents are set up by using Cisco Unity distribution lists, classes of service, extension ranges, imported CSV files, or home mail servers. Any membership changes to these groups that are made by using the Cisco Unity Administrator are automatically carried forward to the Message Store Manager agents.

After setting up the agents, you can configure and schedule tasks to be run daily, weekly, or monthly, according to the needs of your site.

For more information on setting up agents and using the Message Store Manager utility, refer to the utility Help.

Found at this link;

http://www.ciscounitytools.com/App_MSM.htm

Hope this helps!

Rob