I have user with a mailbox, let's say it's 1000. They need to be able to take calls, but they would also like a DDI for this mailbox that when dialled, always goes straight to voicemail. So I created a multicall key #1000, set the always alt to be the VM hunt group. This works fine internally, goes straight to mailbox 1000 when you dial #1000 but if I assign a DDI to it, it sends back a 404 and doesn't accept the call. I swear I have had this working on other systems but I just can't see what I've missed.