Hi Thomas,
This should be most possible
Here are the methods for Unity and Unity Connection;
For Unity Connection;
Message Waiting Indicators
Cisco Unity Connection can set message waiting indicators (MWIs) at up to 10 extensions for a user when new voice messages arrive.
When a user account is added, Connection automatically enables the MWI at the primary extension for the user.
You can change MWI settings, and add or delete MWI extensions in Cisco Unity Connection Administration on the Message Waiting Indicators page for a user.
To Add MWIs for Other Extensions
Step 1 In Cisco Unity Connection Administration, find the user for whom you want to add another MWI.
Step 2 On the Edit menu, click Message Waiting Indicators.
Step 3 On the Message Waiting Indicators page, click Add New.
Step 4 On the New Message Waiting Indicator page, check the Enabled check box.
Step 5 In the Display Name field, enter a description for the MWI.
Step 6 Optionally, check the Inherit User's Extension check box to use the primary extension for the user as the extension on which the message waiting indicator (MWI) appears.
Step 7 In the Extension field, enter the extension for the MWI. When entering characters, consider the following:
•Enter digits 0 through 9. Do not use spaces, dashes, or parentheses.
•Enter , (comma) to insert a one-second pause.
•Enter # and * to correspond to the # and * keys on the phone.
Step 8 In the Phone System field, click the name of the phone system that the extension is assigned to.
Step 9 Click Save.
Step 10 Repeat Step 2 through Step 9 as necessary.
http://www.cisco.biz/en/US/docs/voice_ip_comm/connection/7x/user_mac/guide/7xcucmac040.html#wp1267728
For Unity;
Setting Up Alternate MWIs for Extensions on the Same Phone System
Cisco Unity can activate alternate MWIs for extensions on the same phone system. Note that depending on the phones and phone systems, some additional phone system programming may be necessary. Refer to the installation guide for the phone system.
To enable alternate MWIs for extensions on the same phone system, do the following procedure for each subscriber who needs alternate MWIs.
To Set Up Alternate MWIs for Extensions on the Same Phone System
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Step 1 In the Cisco Unity Administrator, go to the applicable Subscribers > Subscribers > Messages page.
Step 2 Confirm that the Use MWI for Message Notification check box is checked.
Step 3 Click the Add button located beneath the MWI Extensions table to add a row to the table. By default, the first row in the table contains an "X" to indicate the primary extension assigned to a subscriber. If you want one more extension and do not need to activate the MWI on the primary extension, you can also modify the first row.
Step 4 Enter the applicable extension in the Extension field of the table. MWIs are automatically enabled for all rows in the table. When entering characters in the MWI Extensions table, consider the following:
Enter digits 0 through 9. Do not use spaces, dashes, or parentheses.
Enter , (comma) to insert a one-second pause.
Enter # and * to correspond to the # and * keys on the phone.
Step 5 Click the Save icon.
Step 6 Repeat Step 3 through Step 5 as necessary.
http://www.cisco.com/en/US/docs/voice_ip_comm/unity/401/integration/guide/c50acu4x.html#wp1808513
Hope this helps!
Rob
