Just wondering how I do this? I have calls coming in from sip trunk to ephone dn 20 which has a number of 520. I have night-service bell enabled which works fine. During the day it forwards to ext 511. However, currently when calling it says no mailbox configured for this extension. Which is correct. But, how do I create one? It doesn't show on the cue webpage, not sure how to do it by cli.