I'm lost on this one.
I have a couple voice mailboxes that don't seem to be updating MWI status.
MWI DN's can be dialed from the phones and the light does turn on/off.
UnityMsgStore Exchange account has access to the user's mailbox. I have verified this through OWA.
User is VM only so messages are not being moved from Inbox.
There don't seem to be any messages in the AvNotifierMgr event log for this user.
When I change a message to unread in the account the MWI status in Unity web interface doesn't change from Off.
It seems like Unity isn't monitoring the mailbox but I can't figure out why.