I have a phone (7912) with 2 voicemails. One is the VM of the DN associated with the phone and the other VM is just a MWI extensions. I have unread messages on both VMs, but when I listen to them on the VM associated with the phone, the light turn off even though there still messages on the "virtual" VM so this user doesn't know that there is messages in his VM. Can I do something about it? I want the light to be On if there is an unread messages in any one of VM. Users told me that it was working fine before, but I don't know about that. I'm using Unity 4.2(1).
What version of call maanger are you using? If you are using call manager below 6.X,the behaviour is expected. MWI only works for the primary line.