I'm setting up an Avaya ACS 3.0 and It's a fairly simple setup, however when the caller wants to speak to someone in sales I am using a hunt group, so when they press "2" it sends them to hunt group (ext.) 71, which rings 3 extensions in the sales dept.

What's the best way to send that to a voicemail box if nobody answers? I can't assign a mailbox to extension 71, and I haven't figured out what to do at that point, after several rings the caller simply hears "that party is not available" (the default message for no mailbox)

Thanks for your help.