Hi Robert,
There are a number of changed behaviours for Unity 4.2(1) listed in this doc. Here is one of them;
Specifying Per Subscriber Whether Subscribers Confirm Addressees by Name
By default, when subscribers send, forward, or reply to messages by phone, Cisco Unity does not ask them to confirm each addressee-even when they use subscriber extensions to address messages. For subscribers who want Cisco Unity to confirm each addressee by name (regardless of how they added the addressee), you can specify that Cisco Unity plays the prompt " added" after each addressee.
You make the change for individual subscribers or for groups of subscribers on the applicable Conversation page for a subscriber template or an individual subscriber in the Cisco Unity Administrator, or by using the Bulk Edit utility. For more information and a procedure, refer to the "Specifying That Cisco Unity Will Prompt Subscribers to Confirm Addressees by Name" section in the "Cisco Unity System Administration Guide" chapter of the Cisco Unity Documentation Addendum, Release 4.2 at http://www.cisco.com/en/US/docs/voice_ip_comm/unity/42/addendum/add.html.
In earlier versions, you adjusted a setting in the Advanced Settings Tool to specify whether Cisco Unity asked all subscribers associated with a Cisco Unity server to confirm addressees by name. If you are upgrading to Cisco Unity version 4.2(1), see the "Conversation Settings Changed or Removed from Advanced Settings Tool" section.
From this 4.2(1) doc;
http://www.cisco.com/en/US/docs/voice_ip_comm/unity/42/release/notes/cu421rn.html#wp333050
Hope this helps!
Rob
