We've been experiencing some infrequent issues with CUE 2.3 (CME 4.1 and IOS 12.4(15)T1) where voice mail message indicators aren't being updated as soon as the message is delivered. Sometimes the message notification isn't activated until a day later. We're using the SIP outcalling MWI notification mechanism via two extensions to activate/decactive the MWI light on the phones.
Whenever this occurs we've been reloading the router as a temporary fix. Any ideas?