I've just set up dynamic extension express for myself on our Mitel 250 system. I've got my regular desk phone and now a SIP DECT handset to use when I'm away from my desk. I've set the DECT phone up as 'Desk 2' in my associated destinations and set it as destination 2 in Dynamic Extension Express. This works when my main extension receives calls internally but not with calls received from external numbers.
Can anyone advise if it is possible to get this working with external calls too?