You can change this setting based on Class of Service.
Step 1 In Cisco Unity Connection Administration, find the COS that you want to change, or create a new one.
Step 2 On the Edit Class of Service page, under Message Options, check or uncheck the Delete Messages Without Saving to Deleted Items Folder check box, as follows:
•To allow users to access deleted messages, uncheck the check box.
•If you want messages permanently deleted when users delete them, check the check box.
Step 3 Click Save.
Take a look at the following link.
http://www.cisco.com/en/US/docs/voice_ip_comm/connection/2x/user_mac/guide/2xcucmac050.html#wp1060562
Hope this helps. If so, please rate the post.
Brandon
