I am running CUCM 6.1 and Unity 5.0.
I have an extension set up for a department voicemail. The extension is shared on nine 7960 phones, as a secondary line. Each phone has a primary line with voicemail, and the secondary line.
The issue is that the MWI is not working for the second line. It works fine for the primary line, so I know the issue is not phones themselves.
I have set the Visual Message Waiting Indicator Policy to "Light and Prompt" and "Prompt Only" on a test phone, neither setting resolved the issue.
Any suggestions on what other settings I should look at?