Change call destination on "Call Reject"

I have a customer that does not have voicemail on all extensions. When they reject a call on an extension that does not have an active voicemail, the call simply hungs up. Is there a way to “divert” the rejected so that the call is sent to another voicemail ?

If I change the “Mailbox” setting in the advanced tab of the extension options to something like 201@device, would the rejected call be transfered to the 201 voicemail ?

Or maybe do I have to change the “Optional Destinations” to point to another extension’s voicemail ? I’m just not sure what scenario would apply (No Answer, Busy, Not reachable)

Thanks

You are on the right track. Just change the destination for “Busy” under “Optional Destinations” for this extension.