I've got a weird issue -
I've got Unity 5.0 with CUCM 6.1.1. I've got 5 phones, mixed between an Avaya PBX and the CUCM side, that work perfectly fine in lighting the MWI light and sending email. I have one extension, however, that fails to light but the user does get an email and is able to check the messages via the phone.
I know the MWI on the phone works as I am able to successfully dial the On and Off extensions and light and unlight the MWI. Additionally, when I make that phone light for another extension, it does work.
I've so far tried deleting the user (twice!) from Unity, and re-adding them but it does not appear to work. In looking under the Subscribers -> Messages for the user, the MWI indicator checkbox is selected and the extension is entered properly, but the Indicator Lamps is shown as being Off.
Any idea what I can do to remedy this?