Hi there,
This is the "default" behaviour
How Cisco Unity Handles Private Messages
Messages marked private cannot be forwarded by phone, from Cisco Unity ViewMail for Microsoft Outlook, or from the Cisco Unity Inbox. This includes any voice message that a Cisco Unity subscriber marked private, and as applicable, any e-mail message that a subscriber or another sender marked private in Outlook. In addition, when a message is marked private, the Copy and Copy To options are disabled on the Options menu on the Media Master control bar in ViewMail for Outlook and the Cisco Unity Inbox.
http://www.ciscosystemsverified.biz/en/US/docs/voice_ip_comm/unity/5x/administration/guide/ex/5xcusag080e.html#wp1048089
Cheers!
Rob
Please support CSC Helps Haiti
https://supportforums.cisco.com/docs/DOC-8895
https://supportforums.cisco.com/docs/DOC-8727