Is your Unity system Digitally Networked?

You may be running into:

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCsd38385

Else have a look at this:

http://www.ciscounitytools.com/TOI_Unity42.htm

Look for the Training Video for "Customizable subject lines".

per the video, the Advanced Setting Tool

in the Tools Depot has options for customizing subject text

for the Unity 4.2(1) release based on the source of the call.

If you open the Tools Depot > Administrative Tools > Advanced

Settings tool, there is a registry setting called "Administration

- Subject line customization, subscriber to subscriber messages"

Unity 4.2(1) and later allows some customization of the subject

line text Unity constructs for new inbound messages. There are

4 different subject lines used for inbound messages:

1. Messages from known subscribers to another subscriber.

2. Messages from an unknown caller to another subscriber

3. Messages left for an interview handler

4. Messages left via the live record function.

Subject lines can include any text and use "insertion variable"

strings for adding the subscriber's name, extension, calling

number and called number. If the variable in question is not

available, it will simply be blank in the subject line.

Currently four insertion variable strings are available to

include in the line:

%NAME% (sending subscriber's name or sending interview box's

name)

%EXTENSION% (sending subscriber's primary extension or sending

interview box's DTMF ID - if available)

%CALLERID% (Caller ID as obtained from the switch integration)

%CALLEDID% (Called ID as obtained from the switch integration)

Subject lines can be edited only for US English via the Advanced

Settings tool.