I have one user that just recently started receiving the message "your messages are not available now" when checking voicemail. The user does get voicemail messages delivered via Exchange/Outlook, but there is no MWI set on the phone when a new message arrives, and any messages can't be accessed via the phone.
This is the only user with this problem, and there doesn't appear to have been any changes made.
I did find one post that said it looked like a permissions problem, but I followed the instructions on that post and all looked good.
Any experience with this out there? Using CM 4.1 and Unity 4. Thanks in advance.