You'll need to delete the user on the CCM side.
Hope this helps,
Is that it?
I have the same issue and found that same solution, but that is not a viable solution.
I have production emergency phones that need to be deleted from Unity, I never got this part of the disclaimer on CUCM-BE.
Do you know if there are any other alternatives out there? I have a situation where the customer changed their minds on a handful of phones that should not have voicemail but the phones are set up with user accounts which are associated to the phones and vice versa so I was just curious if there was another way. Seems odd that Cisco wouldn't allow you to remove just the voicemail account without having to delete the CUCM User. I'm running CUCMBE 188.8.131.5200-1.
Thanks a lot!
Afraid so, I managed to reach a girl in TAC once long ago that went in and messed with my Oracle DBase and delete the Unity user but, there is no built in way to accomplish this in CUCuMBEr 6.x