1.  To record and configure voicemails for entire user groups go to Settings>Users>User Groups.  

2.  Search for the user group that you would like to set up a voicemail for, and click on the Edit icon to the left of the group's name.    

3.   Scroll down to Voicemail Options.  Here you can record a voicemail message, view numbers associated with the group, and configure Voicemail behaviors. 

Note:  Make sure to un-check the Use System Voicemail Settings box.  To learn more about system voicemails, see our support article here.