I was just wondering if anyone has had a similar issue before. I am troubleshooting an issue where several users MWI lights are either always on or always off. I've confirmed through Unity that everything seems to be working. I can issue a refresh on the Subscriber Messages page and watch in Port Monitor the MWI cancel or set call go out, but it has no effect on the user's phone.
After researching this further I found that these users can dial the MWI off extension with no results, the light remains on or off. I've verified that the MWI on/off DNs are in the AllPhones partition and these users have a CSS set that can call the AllPhones partition. The user doesn't get a fast busy when dialing. I've tried upgrading the firmware on these phones and rebooting the CCM cluster, but the issue still persists. I've also opened a TAC case, but they've provided very little help. I was hoping some of you guys/girls out there have some other things to try!
It should be noted that this issue is affecting about 12 users out of 150.