After a recent Unity reboot all came up fine, all processes started, all looks fine but the voicemail messages are blank !!!
They seem to be a sensible size as an Email attachment in outlook but no sound at all, same with people using 7940 type phones they listen to a blank voicemail.
I've has to disable voicemail for the day as there's nothing worse than blank voicemails for receptionists etc.
Any thoughts.... very much appreciated Unity 4.05, CCM4, Exchange 2003